fix incorrect window destroy

Author: Atterpac

v3/pkg/events/defaults.go

@@ -40,7 +40,6 @@ var defaultWindowEventMapping = map[string]map[WindowEventType]WindowEventType{
 		Mac.WindowZoomIn:             Common.WindowZoomIn,
 		Mac.WindowZoomOut:            Common.WindowZoomOut,
 		Mac.WindowZoomReset:          Common.WindowZoomReset,
-		Mac.WindowShouldClose:        Common.WindowClosing,
 		Mac.WindowDidResignKey:       Common.WindowLostFocus,
 		Mac.WindowDidResignMain:      Common.WindowLostFocus,
 		Mac.WindowDidResize:          Common.WindowDidResize,