Removed unused variable.
diff --git a/src/video/cocoa/SDL_cocoawindow.m b/src/video/cocoa/SDL_cocoawindow.m
index 06ecd62..36d762a 100644
--- a/src/video/cocoa/SDL_cocoawindow.m
+++ b/src/video/cocoa/SDL_cocoawindow.m
@@ -549,7 +549,6 @@
 - (void)windowDidEnterFullScreen:(NSNotification *)aNotification
 {
     SDL_Window *window = _data->window;
-    NSWindow *nswindow = _data->nswindow;
 
     inFullscreenTransition = NO;