m4/getpagesize.m4: Don't track autogenerated file

m4/getpagesize.m4

@@ -1,49 +0,0 @@
-# getpagesize.m4 serial 10
-dnl Copyright (C) 2002, 2004-2005, 2007, 2009-2020 Free Software Foundation,
-dnl Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN([gl_FUNC_GETPAGESIZE],
-[
-  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
-  AC_REQUIRE([AC_CANONICAL_HOST])
-  gl_CHECK_FUNC_GETPAGESIZE
-  if test $gl_cv_func_getpagesize = no; then
-    HAVE_GETPAGESIZE=0
-    AC_CHECK_HEADERS([OS.h])
-    if test $ac_cv_header_OS_h = yes; then
-      HAVE_OS_H=1
-    fi
-    AC_CHECK_HEADERS([sys/param.h])
-    if test $ac_cv_header_sys_param_h = yes; then
-      HAVE_SYS_PARAM_H=1
-    fi
-  fi
-  case "$host_os" in
-    mingw*)
-      REPLACE_GETPAGESIZE=1
-      ;;
-  esac
-  dnl Also check whether it's declared.
-  dnl mingw has getpagesize() in libgcc.a but doesn't declare it.
-  AC_CHECK_DECL([getpagesize], , [HAVE_DECL_GETPAGESIZE=0])
-])
-
-dnl Tests whether the function getpagesize() exists.
-dnl Sets gl_cv_func_getpagesize.
-AC_DEFUN([gl_CHECK_FUNC_GETPAGESIZE],
-[
-  dnl We can't use AC_CHECK_FUNC here, because getpagesize() is defined as a
-  dnl static inline function when compiling for Android 4.4 or older.
-  AC_CACHE_CHECK([for getpagesize], [gl_cv_func_getpagesize],
-    [AC_LINK_IFELSE(
-       [AC_LANG_PROGRAM(
-          [[#include <unistd.h>]],
-          [[return getpagesize();]])
-       ],
-       [gl_cv_func_getpagesize=yes],
-       [gl_cv_func_getpagesize=no])
-    ])
-])