Remove unneeded play()s in intermission menu

For some reason these were here, but they don't do anything, because the
music here should be playing Presenting VVVVVV already.

desktop_version/src/Input.cpp

@@ -1972,13 +1972,11 @@ static void menuactionpress(void)
         {
         case 0:
             music.playef(11);
-            music.play(6);
             game.createmenu(Menu::playint1);
             map.nexttowercolour();
             break;
         case 1:
             music.playef(11);
-            music.play(6);
             game.createmenu(Menu::playint2);
             map.nexttowercolour();
             break;