diff --git a/data_model/data_model.hpp b/data_model/data_model.hpp
deleted file mode 100644
index 2dbd054fc..000000000
--- a/data_model/data_model.hpp
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef MEMGRAPH_DATA_MODEL_DATA_MODEL_HPP
-#define MEMGRAPH_DATA_MODEL_DATA_MODEL_HPP
-
-#include "node.hpp"
-#include "edge.hpp"
-
-#endif
diff --git a/data_model/edge.hpp b/data_model/edge.hpp
deleted file mode 100644
index 9531bbbd2..000000000
--- a/data_model/edge.hpp
+++ /dev/null
@@ -1,17 +0,0 @@
-#ifndef MEMGRAPH_DATA_MODEL_EDGE_HPP
-#define MEMGRAPH_DATA_MODEL_EDGE_HPP
-
-#include "json/all.hpp"
-#include "record.hpp"
-
-struct Node;
-
-struct Edge : Record
-{
-    Node* from;
-    Node* to;
-
-    json::Object* data;
-};
-
-#endif
diff --git a/data_model/graph.hpp b/data_model/graph.hpp
deleted file mode 100644
index b74f73ed9..000000000
--- a/data_model/graph.hpp
+++ /dev/null
@@ -1,13 +0,0 @@
-#ifndef MEMGRAPH_DATA_MODEL_GRAPH_HPP
-#define MEMGRAPH_DATA_MODEL_GRAPH_HPP
-
-#include <vector>
-
-#include "node.hpp"
-#include "edge.hpp"
-
-struct Graph
-{
-}
-
-#endif
diff --git a/data_model/json/all.hpp b/data_model/json/all.hpp
deleted file mode 100644
index d6bf229a4..000000000
--- a/data_model/json/all.hpp
+++ /dev/null
@@ -1,14 +0,0 @@
-#ifndef MEMGRAPH_DATA_MODEL_JSON_ALL_HPP
-#define MEMGRAPH_DATA_MODEL_JSON_ALL_HPP
-
-#include "array.hpp"
-#include "bool.hpp"
-#include "integral.hpp"
-#include "json.hpp"
-#include "null.hpp"
-#include "object.hpp"
-#include "primitive.hpp"
-#include "real.hpp"
-#include "string.hpp"
-
-#endif
diff --git a/data_model/json/array.hpp b/data_model/json/array.hpp
deleted file mode 100644
index 0ec2187f5..000000000
--- a/data_model/json/array.hpp
+++ /dev/null
@@ -1,84 +0,0 @@
-#ifndef MEMGRAPH_DATA_MODEL_JSON_ARRAY_HPP
-#define MEMGRAPH_DATA_MODEL_JSON_ARRAY_HPP
-
-#include <cassert>
-#include <memory>
-#include <vector>
-
-#include "utilities/string/intercalate.hpp"
-
-#include "json.hpp"
-
-namespace json
-{
-
-class Array final : public Json
-{
-public:
-    Array() {}
-
-    template <typename It>
-    Array(It first, It last)
-        : elements(first, last) {}
-
-    Array(std::initializer_list<spJson> elements)
-        : elements(elements) {}
-
-    virtual bool is_array() const;
-
-    size_t size() const;
-
-    Array& push(const std::shared_ptr<Json>& element);
-
-    const spJson& operator[](size_t i) const;
-          spJson  operator[](size_t i);
-
-    virtual operator std::string() const;
-
-private:
-    std::vector<spJson> elements;
-};
-
-bool Array::is_array() const
-{
-    return true;
-}
-
-size_t Array::size() const
-{
-    return elements.size();
-}
-
-Array& Array::push(const spJson& element)
-{
-    assert(element);
-
-    elements.push_back(element);
-    return *this;
-}
-
-const spJson& Array::operator[](size_t i) const
-{
-    return elements[i];
-}
-
-spJson Array::operator[](size_t i)
-{
-    return elements[i];
-}
-
-Array::operator std::string() const
-{
-    std::vector<std::string> xs;
-
-    std::transform(elements.begin(), elements.end(), std::back_inserter(xs),
-        [](const spJson& element) {
-            return static_cast<std::string>(*element);
-        });
-
-    return "[" + utils::intercalate(xs.begin(), xs.end(), ",") + "]";
-}
-
-}
-
-#endif  
diff --git a/data_model/json/bool.hpp b/data_model/json/bool.hpp
deleted file mode 100644
index 545386062..000000000
--- a/data_model/json/bool.hpp
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef MEMGRAPH_DATA_MODEL_JSON_BOOL_HPP
-#define MEMGRAPH_DATA_MODEL_JSON_BOOL_HPP
-
-#include "primitive.hpp"
-
-namespace json {
-
-class Bool final : public Primitive<bool> 
-{
-public:
-    Bool() {}
-
-    Bool(bool value) 
-        : Primitive<bool>(value) {}
-    
-    virtual bool is_boolean() const;
-
-    virtual operator std::string() const;
-};
-
-bool Bool::is_boolean() const
-{
-    return true;
-}
-
-Bool::operator std::string() const
-{
-    return value == true ? "true" : "false";
-}
-
-}
-
-#endif
diff --git a/data_model/json/integral.hpp b/data_model/json/integral.hpp
deleted file mode 100644
index 2467f8742..000000000
--- a/data_model/json/integral.hpp
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef MEMGRAPH_DATA_MODEL_JSON_INTEGRAL_HPP
-#define MEMGRAPH_DATA_MODEL_JSON_INTEGRAL_HPP
-
-#include "primitive.hpp"
-
-namespace json {
-
-class Integral final : public Primitive<int64_t>
-{
-public:
-    Integral() {}
-
-    Integral(int64_t value)
-        : Primitive<int64_t>(value) {}
-
-    virtual bool is_integral() const;
-
-    virtual operator std::string() const;  
-};
-
-bool Integral::is_integral() const
-{
-    return true;
-}
-
-Integral::operator std::string() const
-{
-    return std::to_string(value);
-}
-
-}
-
-#endif
diff --git a/data_model/json/json.hpp b/data_model/json/json.hpp
deleted file mode 100644
index dc9784108..000000000
--- a/data_model/json/json.hpp
+++ /dev/null
@@ -1,47 +0,0 @@
-#ifndef MEMGRAPH_DATA_MODEL_JSON_JSON_HPP
-#define MEMGRAPH_DATA_MODEL_JSON_JSON_HPP
-
-#include <initializer_list>
-#include <string>
-#include <memory>
-
-namespace json {
-
-class Json;
-
-typedef std::shared_ptr<Json> spJson;
-
-class Json
-{
-public:
-    Json() {}
-    virtual ~Json() {}
-
-    virtual bool is_object()   const { return false; }
-    virtual bool is_array()    const { return false; }
-    virtual bool is_real()     const { return false; }
-    virtual bool is_integral() const { return false; }
-    virtual bool is_boolean()  const { return false; }
-    virtual bool is_null()     const { return false; }
-
-    template <typename T> T& as();
-    template <typename T> const T& as() const;
-
-    virtual operator std::string() const = 0;
-};
-
-template <typename T>
-T& Json::as()
-{
-    return *dynamic_cast<T*>(this);
-}
-
-template <typename T>
-const T& Json::as() const
-{
-    return *dynamic_cast<T*>(this);
-}
-
-}
-
-#endif
diff --git a/data_model/json/null.hpp b/data_model/json/null.hpp
deleted file mode 100644
index 3a50bf867..000000000
--- a/data_model/json/null.hpp
+++ /dev/null
@@ -1,30 +0,0 @@
-#ifndef MEMGRAPH_DATA_MODEL_JSON_NULL_HPP
-#define MEMGRAPH_DATA_MODEL_JSON_NULL_HPP
-
-#include "json.hpp"
-
-namespace json {
-
-class Null final : public Json 
-{
-public:
-    Null() {}
-    
-    virtual bool is_null() const;
-
-    virtual operator std::string() const;
-};
-
-bool Null::is_null() const
-{
-    return true;
-}
-
-Null::operator std::string() const
-{
-    return "null";
-}
-    
-}
-
-#endif
diff --git a/data_model/json/object.hpp b/data_model/json/object.hpp
deleted file mode 100644
index ee7b13ce1..000000000
--- a/data_model/json/object.hpp
+++ /dev/null
@@ -1,106 +0,0 @@
-#ifndef MEMGRAPH_DATA_MODEL_JSON_OBJECT_HPP
-#define MEMGRAPH_DATA_MODEL_JSON_OBJECT_HPP
-
-#include <iostream>
-
-#include <functional>
-#include <sstream>
-#include <cassert>
-#include <vector>
-#include <map>
-
-#include "utilities/string/intercalate.hpp"
-
-#include "json.hpp"
-
-namespace json {
-
-typedef std::pair<const std::string, spJson> const_kv_pair_t;
-typedef std::pair<std::string, spJson> kv_pair_t;
-
-class Object;
-
-typedef std::shared_ptr<Object> spObject;
-
-class Object : public Json
-{
-public:
-    Object() {}
-
-    Object(std::initializer_list<const_kv_pair_t> elements)
-        : props(elements) {}
-
-    virtual bool is_object() const;
-
-    const spJson& at(const std::string& key) const;
-          spJson  at(const std::string& key);
-
-    const spJson& operator[](const std::string& key) const;
-          spJson  operator[](const std::string& key);
-
-    Object& put(const std::string& key, spJson value);
-
-    Object& operator<<(const kv_pair_t& kv_pair);
-
-    virtual operator std::string() const;
-
-protected:
-    std::map<std::string, spJson> props;
-};
-
-bool Object::is_object() const
-{
-    return true;
-}
-
-const spJson& Object::at(const std::string& key) const
-{
-    return props.at(key);
-}
-
-spJson Object::at(const std::string& key)
-{
-    return props.at(key);
-}
-
-const spJson& Object::operator[](const std::string& key) const
-{
-    return this->at(key);
-}
-
-spJson Object::operator[](const std::string& key)
-{
-    return this->at(key);
-}
-
-Object& Object::put(const std::string& key, spJson value)
-{
-    assert(value);
-
-    props[key] = value;
-    return *this;
-}
-
-Object& Object::operator<<(const kv_pair_t& kv_pair)
-{
-    return this->put(std::get<0>(kv_pair), std::get<1>(kv_pair));
-}
-
-Object::operator std::string() const
-{
-    if(props.empty())
-        return "{}";
-
-    std::vector<std::string> xs;
-
-    std::transform(props.begin(), props.end(), std::back_inserter(xs),
-        [](const kv_pair_t& kvp) {
-            return "\"" + kvp.first + "\":" + static_cast<std::string>(*kvp.second);
-        });
-
-    return "{" + utils::intercalate(xs.begin(), xs.end(), ",") + "}";
-}
-
-}
-
-#endif
diff --git a/data_model/json/primitive.hpp b/data_model/json/primitive.hpp
deleted file mode 100644
index cf4a9451b..000000000
--- a/data_model/json/primitive.hpp
+++ /dev/null
@@ -1,29 +0,0 @@
-#ifndef MEMGRAPH_DATA_MODEL_JSON_PRIMITIVE_HPP
-#define MEMGRAPH_DATA_MODEL_JSON_PRIMITIVE_HPP
-
-#include "json.hpp"
-
-namespace json {
-
-template <class T>
-class Primitive : public Json
-{
-public:
-    Primitive() {}
-
-    Primitive(const T& value)
-        : value(value) {}
-
-    T get() const { return value; }
-    void set(T value) { this->value = value; }
-
-    operator T() const { return this->get(); }
-    
-protected:
-    T value;
-};
-
-
-}
-
-#endif
diff --git a/data_model/json/real.hpp b/data_model/json/real.hpp
deleted file mode 100644
index 214b2ba63..000000000
--- a/data_model/json/real.hpp
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef MEMGRAPH_DATA_MODEL_JSON_REAL_HPP
-#define MEMGRAPH_DATA_MODEL_JSON_REAL_HPP
-
-#include "primitive.hpp"
-
-namespace json {
-
-class Real final : public Primitive<float> 
-{
-public:
-    Real() {}
-
-    Real(float value)
-        : Primitive<float>(value) {}
-    
-    virtual bool is_real() const;
-
-    virtual operator std::string() const;
-};
-
-bool Real::is_real() const
-{
-    return true;
-}
-
-Real::operator std::string() const
-{
-    return std::to_string(value);
-}
-
-}
-
-#endif
diff --git a/data_model/json/string.hpp b/data_model/json/string.hpp
deleted file mode 100644
index 842a7399b..000000000
--- a/data_model/json/string.hpp
+++ /dev/null
@@ -1,34 +0,0 @@
-#ifndef MEMGRAPH_DATA_MODEL_JSON_STRING_HPP
-#define MEMGRAPH_DATA_MODEL_JSON_STRING_HPP
-
-#include "primitive.hpp"
-
-namespace json
-{
-
-class String final : public Primitive<std::string>
-{
-public:
-    String() {}
-
-    String(const std::string& value) 
-        : Primitive<std::string>(value) {}
-
-    virtual bool is_string() const;
-
-    virtual operator std::string() const;
-};
-
-bool String::is_string() const
-{
-    return true;
-}
-
-String::operator std::string() const
-{
-    return "\"" + value + "\"";
-}
-
-}
-
-#endif
diff --git a/data_model/node.hpp b/data_model/node.hpp
deleted file mode 100644
index b797f0026..000000000
--- a/data_model/node.hpp
+++ /dev/null
@@ -1,18 +0,0 @@
-#ifndef MEMGRAPH_DATA_MODEL_NODE_HPP
-#define MEMGRAPH_DATA_MODEL_NODE_HPP
-
-#include <vector>
-
-#include "json/all.hpp"
-#include "record.hpp"
-#include "edge.hpp"
-
-struct Node : Record
-{
-    std::vector<Edge*> in;
-    std::vector<Edge*> out;
-
-    json::Object* data;
-};
-
-#endif
diff --git a/data_model/record.hpp b/data_model/record.hpp
deleted file mode 100644
index cffa519d9..000000000
--- a/data_model/record.hpp
+++ /dev/null
@@ -1,14 +0,0 @@
-#ifndef MEMGRAPH_DATA_MODEL_RECORD_HPP
-#define MEMGRAPH_DATA_MODEL_RECORD_HPP
-
-#include <cstdlib>
-
-class Record
-{
-    uint64_t id;
-
-    // used by MVCC to keep track of what's visible to transactions
-    uint64_t xmin, xmax;
-};
-
-#endif
diff --git a/utils/sync/all.hpp b/utils/sync/all.hpp
deleted file mode 100644
index 02ac177b2..000000000
--- a/utils/sync/all.hpp
+++ /dev/null
@@ -1,6 +0,0 @@
-#ifndef MEMGRAPH_UTILS_SYNC_ALL_HPP
-#define MEMGRAPH_UTILS_SYNC_ALL_HPP
-
-#include "spinlock.hpp"
-
-#endif
diff --git a/utils/sync/caslock.hpp b/utils/sync/caslock.hpp
deleted file mode 100644
index 3f6f94691..000000000
--- a/utils/sync/caslock.hpp
+++ /dev/null
@@ -1,20 +0,0 @@
-#ifndef MEMGRAPH_UTILS_SYNC_CASLOCK_HPP
-#define MEMGRAPH_UTILS_SYNC_CASLOCK_HPP
-
-#include <atomic>
-
-struct CasLock
-{
-    uint8_t lock;
-
-    void lock()
-    {
-    }
-
-    void unlock()
-    {
-    }
-    
-};
-
-#endif
diff --git a/utils/sync/spinlock.hpp b/utils/sync/spinlock.hpp
deleted file mode 100644
index 955cfc737..000000000
--- a/utils/sync/spinlock.hpp
+++ /dev/null
@@ -1,31 +0,0 @@
-#ifndef MEMGRAPH_UTILS_SYNC_SPINLOCK_HPP
-#define MEMGRAPH_UTILS_SYNC_SPINLOCK_HPP
-
-#include <atomic>
-#include <unistd.h>
-
-class SpinLock
-{
-public:
-    void lock();
-    void unlock();
-
-private:
-    // guaranteed by standard to be lock free!
-    std::atomic_flag lock_flag = ATOMIC_FLAG_INIT;
-};
-
-void SpinLock::lock()
-{
-    // TODO add asm pause and counter first before sleeping
-    // might be faster, but test this and see
-    while(lock_flag.test_and_set(std::memory_order_acquire))
-        usleep(250);
-}
-
-void SpinLock::unlock()
-{
-    lock_flag.clear(std::memory_order_release);
-}
-
-#endif