connectivity: mozabdrv: avoid warning C4005 macro redefinition

Both winnls.h (included via windows.h) and mozilla nsCharTraits.h
define macro IS_HIGH_SURROGATE/IS_LOW_SURROGATE; it turns out that
the nsEmbedAPI.h that drags in winodws.h is apparently unused.

Change-Id: If5189c58dc1fe3a508a360a270337f97333e0ce8

connectivity/source/drivers/mozab/bootstrap/mozilla_nsinit.h

@@ -39,7 +39,6 @@
 #pragma disable_warn
     // somewhere in the files included directly or indirectly in nsString.h, warnings are enabled, again
 #endif
-#include "nsEmbedAPI.h"
 
 #include "nsDirectoryService.h"