Remove (almost) all references to pRenderer (#651)

Remove all references to pRenderer, except from the DebugDraw and LyShine Gems that are still being updated.

Code/CryEngine/CrySystem/MemoryManager.cpp

@@ -17,7 +17,6 @@
 #include "CustomMemoryHeap.h"
 #include "GeneralMemoryHeap.h"
 #include "PageMappingHeap.h"
-#include "DefragAllocator.h"
 
 
 #if defined(AZ_RESTRICTED_PLATFORM)
@@ -217,11 +216,6 @@ IPageMappingHeap* CCryMemoryManager::CreatePageMappingHeap(size_t addressSpace,
     return new CPageMappingHeap(addressSpace, sName);
 }
 
-IDefragAllocator* CCryMemoryManager::CreateDefragAllocator()
-{
-    return new CDefragAllocator();
-}
-
 extern "C"
 {
     CRYMEMORYMANAGER_API void CryGetIMemoryManagerInterface(void** pIMemoryManager)