Fixed bug 4401 - SDL_GetWindowPosition() wrong after SDL_SetWindowPosition() until window is moved on macOS

Removed incorrect call to SDL_SendWindowEvent(window, SDL_WINDOWEVENT_MOVED, x, y);
If the position of the window isn't adjusted in the SetWindowPosition() call, then sending the window event would have no effect because x and y equals the window x and y. If the position of the window is adjusted in the SetWindowPosition() call, then we don't want to clobber it with values that the user passed in.

src/video/SDL_video.c

@@ -1895,7 +1895,6 @@ SDL_SetWindowPosition(SDL_Window * window, int x, int y)
         if (_this->SetWindowPosition) {
             _this->SetWindowPosition(_this, window);
         }
-        SDL_SendWindowEvent(window, SDL_WINDOWEVENT_MOVED, x, y);
     }
 }