Fixed window never being shown on iOS

src/video/android/SDL_androidwindow.c

@@ -58,8 +58,6 @@ int Android_CreateWindow(_THIS, SDL_Window *window)
     window->w = Android_SurfaceWidth;
     window->h = Android_SurfaceHeight;
 
-    window->flags &= ~SDL_WINDOW_HIDDEN;
-
     /* One window, it always has focus */
     SDL_SetMouseFocus(window);
     SDL_SetKeyboardFocus(window);

src/video/uikit/SDL_uikitwindow.m

@@ -99,9 +99,6 @@ static int SetupWindowData(_THIS, SDL_Window *window, UIWindow *uiwindow, SDL_bo
 
     data.uiwindow = uiwindow;
 
-    /* only one window on iOS, always shown */
-    window->flags &= ~SDL_WINDOW_HIDDEN;
-
     if (displaydata.uiscreen != [UIScreen mainScreen]) {
         window->flags &= ~SDL_WINDOW_RESIZABLE;   /* window is NEVER resizable */
         window->flags &= ~SDL_WINDOW_INPUT_FOCUS; /* never has input focus */