bug#56510: Make some games obsolete (or just remove them from the menu)

[Visuwesh]

[திங்கள் ஜூலை 11, 2022] Stefan Kangas wrote:

> Some of the games in Emacs look a bit dated.  I put it to you that they
> are not excellent promotion for Emacs, and that we are better served by
> having fewer but better games.

[ What exactly do you mean by "better games"?  Do you mean to say that
  they should look visually interesting?  ]

> I suggest that we either remove some of them from the "Tools -> Games"
> menu, or obsolete them outright.  Here are the ones that I don't think
> pass the bar:
>
>  - 5x5.el
>  - blackbox.el
>  - gomoku.el
>  - pong.el
>  - solitaire.el

I never properly checked out 5x5 but it looks like really interesting.
I never understood blackbox however.

Gomoku and solitaire are both standard puzzle games.  I was very pleased
to know that my childhood pastime was included in Emacs, I suggest we
don't obsolete them.  (Solitaire in particular is a very rewarding
game.)

Pong is unfortunately too choppy for me to play it.