Remove xp_core.h & xp_mem.h and all build references to them.

Remove cruft from xp_mcom.h & xp_str.h.
Bug #38061 r=brendan sr=alecf a=valeski


git-svn-id: svn://10.0.0.236/trunk@117612 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/extensions/python/xpcom/src/PyXPCOM_std.h

@@ -31,9 +31,6 @@
 //
 // (c) 2000, ActiveState corp.
 
-// Main Mozilla cross-platform declarations.
-#include "xp_core.h"
-
 #include "nsIAllocator.h"
 #include "nsIWeakReference.h"
 #include "nsIInterfaceInfoManager.h"