Fix MoltenVK layer creation when compiling with OSXCross

platform/osx/display_server_osx.mm

@@ -3492,9 +3492,7 @@ DisplayServerOSX::WindowID DisplayServerOSX::_create_window(WindowMode p_mode, c
 		wd.window_view = [[GodotContentView alloc] init];
 		ERR_FAIL_COND_V_MSG(wd.window_view == nil, INVALID_WINDOW_ID, "Can't create a window view");
 		[wd.window_view setWindowID:window_id_counter];
-		if (NSAppKitVersionNumber >= NSAppKitVersionNumber10_14) {
-			[wd.window_view setWantsLayer:TRUE];
-		}
+		[wd.window_view setWantsLayer:TRUE];
 
 		[wd.window_object setCollectionBehavior:NSWindowCollectionBehaviorFullScreenPrimary];
 		[wd.window_object setContentView:wd.window_view];