XCode doesnt support files per configuration, using the old method (#3789)

- some warn fixes
- fixed release linking issue

Signed-off-by: Esteban Papp <81431996+amznestebanpapp@users.noreply.github.com>

Code/Editor/IEditorImpl.cpp

@@ -84,12 +84,6 @@ AZ_POP_DISABLE_WARNING
 #include "IEditorPanelUtils.h"
 #include "EditorPanelUtils.h"
 
-
-// even in Release mode, the editor will return its heap, because there's no Profile build configuration for the editor
-#ifdef _RELEASE
-#undef _RELEASE
-#endif
-
 #include "Core/QtEditorApplication.h"                               // for Editor::EditorQtApplication
 
 static CCryEditDoc * theDocument;
@@ -104,8 +98,6 @@ static CCryEditDoc * theDocument;
 #define VERIFY(EXPRESSION) { auto e = EXPRESSION; assert(e); }
 #endif
 
-#undef GetCommandLine
-
 const char* CEditorImpl::m_crashLogFileName = "SessionStatus/editor_statuses.json";
 
 CEditorImpl::CEditorImpl()