Remove jemalloc 4 from our tree.

memory/replace/jemalloc/moz.build

@@ -1,31 +0,0 @@
-# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
-# vim: set filetype=python:
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-SOURCES += [
-    '../../build/jemalloc_config.cpp',
-    '../../build/mozjemalloc_compat.c',
-]
-
-# Android doesn't have pthread_atfork, so just implement a dummy function.
-# It shouldn't make much problem, as the use of fork is pretty limited on
-# Android.
-if CONFIG['MOZ_WIDGET_TOOLKIT'] == 'android':
-    SOURCES += [
-        'pthread_atfork.c',
-    ]
-
-SharedLibrary('replace_jemalloc')
-
-DEFINES['MOZ_JEMALLOC4'] = True
-DEFINES['MOZ_REPLACE_JEMALLOC'] = True
-
-LOCAL_INCLUDES += ['!../../jemalloc/src/include']
-if CONFIG['_MSC_VER']:
-    LOCAL_INCLUDES += ['/memory/jemalloc/src/include/msvc_compat']
-    if not CONFIG['HAVE_INTTYPES_H']:
-        LOCAL_INCLUDES += ['/memory/jemalloc/src/include/msvc_compat/C99']
-
-DISABLE_STL_WRAPPING = True

memory/replace/jemalloc/pthread_atfork.c

@@ -1,10 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this file,
- * You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-int pthread_atfork(void (*prefork)(void),
-                   void (*postfork_parent)(void),
-                   void (*postfork_child)(void))
-{
-  return 0;
-}

memory/replace/moz.build

@@ -9,9 +9,6 @@ DIRS += [
     'replace',
 ]
 
-# Build jemalloc4 as a replace-malloc lib when building with mozjemalloc
-DIRS += ['jemalloc']
-
 if CONFIG['MOZ_REPLACE_MALLOC_LINKAGE'] == 'dummy library':
     DIRS += ['dummy']