Revert "player: make --force-window create the window immediately on start"

This reverts commit acc5e8f574.

As expected, some didn't like this. Others won't like this revert.
Whatever.

See #1561.

This should go into mpv 0.8.0 before it's released.

player/main.c

@@ -457,7 +457,6 @@ int mp_initialize(struct MPContext *mpctx)
                     "the selected video_out (-vo) device.\n");
             return -1;
         }
-        handle_force_window(mpctx, false);
         mpctx->mouse_cursor_visible = true;
     }