Cocoa: Remove duplicate enum.

Change-Id: I8a3b700710a1c47a31ddeed59ef73f1032ee7d09
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>

src/plugins/platforms/cocoa/qcocoaeventdispatcher.mm

@@ -76,6 +76,7 @@
 #include "qcocoaeventdispatcher.h"
 #include "qcocoaautoreleasepool.h"
 
+#include "qcocoahelpers.h"
 #include "qguiapplication.h"
 #include "qevent.h"
 #include "qhash.h"
@@ -95,11 +96,6 @@ QT_BEGIN_NAMESPACE
 
 QT_USE_NAMESPACE
 
-enum {
-    QtCocoaEventSubTypeWakeup       = SHRT_MAX,
-    QtCocoaEventSubTypePostMessage  = SHRT_MAX-1
-};
-
 static inline CFRunLoopRef mainRunLoop()
 {
     return CFRunLoopGetMain();