Remove unnecessary windows.h include which was used to get InterlockedIncrement for threadsafe interfaces. I fixed the

implementation of threadsafe addref and release for windows to notrequire it so people no longer need to include windows.h whenever
you are using a threadsafe interface.

mailnews/imap/src/nsIMAPHostSessionList.cpp

@@ -20,11 +20,6 @@
 #include "nsIMAPHostSessionList.h"
 #include "nsIMAPBodyShell.h"
 #include "nsIMAPNamespace.h"
-
-#ifdef XP_PC
-#include <windows.h>    // for InterlockedIncrement
-#endif
-
 #include "nsISupportsUtils.h"
 
 nsIMAPHostInfo::nsIMAPHostInfo(const char *hostName, const char *userName)

mailnews/imap/src/nsImapProxyEvent.cpp

@@ -30,10 +30,6 @@
 #include "nsIMAPNamespace.h"
 #include "nsCOMPtr.h"
 
-#if defined(XP_WIN)
-#include <windows.h>						// for InterlockedIncrement
-#endif
-
 nsImapEvent::nsImapEvent()
 {
     m_notifyCompletion = PR_FALSE;