diff --git a/src/main/java/com/typesafe/config/impl/RawValueType.java b/src/main/java/com/typesafe/config/impl/RawValueType.java
deleted file mode 100644
index ae5ac2e5..00000000
--- a/src/main/java/com/typesafe/config/impl/RawValueType.java
+++ /dev/null
@@ -1,27 +0,0 @@
-package com.typesafe.config.impl;
-
-import com.typesafe.config.ConfigValueType;
-
-enum RawValueType {
-    OBJECT(ConfigValueType.OBJECT),
-
-    LIST(ConfigValueType.LIST),
-
-    NUMBER(ConfigValueType.NUMBER),
-
-    BOOLEAN(ConfigValueType.BOOLEAN),
-
-    NULL(ConfigValueType.NULL),
-
-    STRING(ConfigValueType.STRING),
-
-    SUBSTITUTION(null),
-
-    INCLUDE(null);
-
-    ConfigValueType cooked;
-
-    RawValueType(ConfigValueType cooked) {
-        this.cooked = cooked;
-    }
-}
diff --git a/src/main/java/com/typesafe/config/impl/StackConfigObject.java b/src/main/java/com/typesafe/config/impl/StackConfigObject.java
deleted file mode 100644
index f9d2784e..00000000
--- a/src/main/java/com/typesafe/config/impl/StackConfigObject.java
+++ /dev/null
@@ -1,76 +0,0 @@
-package com.typesafe.config.impl;
-
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-
-import com.typesafe.config.ConfigOrigin;
-
-/**
- * This is unused for now, decided that it was too annoying to "lazy merge" and
- * better to do the full merge up-front.
- */
-final class StackConfigObject extends AbstractConfigObject {
-
-    private List<AbstractConfigObject> stack;
-
-    /**
-     * The stack is ordered from highest to lowest priority. So the start of the
-     * list is the top of the search path.
-     */
-    StackConfigObject(ConfigOrigin origin, ConfigTransformer transformer,
-            List<AbstractConfigObject> stack) {
-        super(origin, transformer);
-        this.stack = stack;
-    }
-
-    @Override
-    public boolean containsKey(String key) {
-        for (AbstractConfigObject o : stack) {
-            if (o.containsKey(key))
-                return true;
-        }
-        return false;
-    }
-
-    @Override
-    public Set<String> keySet() {
-        if (stack.isEmpty()) {
-            return Collections.emptySet();
-        } else if (stack.size() == 1) {
-            return stack.get(0).keySet();
-        } else {
-            Set<String> combined = new HashSet<String>();
-            for (AbstractConfigObject o : stack) {
-                combined.addAll(o.keySet());
-            }
-            return combined;
-        }
-    }
-
-    @Override
-    public Object unwrapped() {
-        Map<String, Object> m = new HashMap<String, Object>();
-        for (AbstractConfigObject o : stack) {
-            for (String k : o.keySet()) {
-                m.put(k, o.peek(k).unwrapped());
-            }
-        }
-        return m;
-    }
-
-    @Override
-    protected AbstractConfigValue peek(String key) {
-        for (AbstractConfigObject o : stack) {
-            // Important: A ConfigNull value would override
-            // and keep us from returning a later non-null value.
-            AbstractConfigValue v = o.peek(key);
-            if (v != null)
-                return v;
-        }
-        return null;
-    }
-}