Remove unused variables in the Cocoa plugin

Change-Id: I7cdd369e2fbab02954da6ba3c05b31d93f1e7995
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>

src/plugins/platforms/cocoa/qcocoaapplicationdelegate.mm

@@ -206,7 +206,6 @@ static void cleanupCocoaApplicationDelegate()
             // events while the event loop is still running.
             const QWindowList topLevels = QGuiApplication::topLevelWindows();
             for (int i = 0; i < topLevels.size(); ++i) {
-                QWindow *window = topLevels.at(i);
                 topLevels.at(i)->close();
             }
 

src/plugins/platforms/cocoa/qcocoakeymapper.h

@@ -99,7 +99,6 @@ private:
         const UCKeyboardLayout *unicode;
         void *other;
     } keyboard_layout_format;
-    KeyboardLayoutRef currentKeyboardLayout;
     KeyboardLayoutKind keyboard_kind;
     UInt32 keyboard_dead;
     KeyboardLayoutItem *keyLayout[256];