Remove some obsolete mailing lists

[jimwins]

No description provided.

[github-actions]

🚀 Commit 45d3ec3 Deployed on https://web-php-pr-1040.preview.thephp.foundation

[cmb69]

This looks good to me, but maybe @derickr will have a look.

[saundefined]

I suggest we wait until the end of the week, if there are no objections, we'll merge it.

Also, I'm not sure if we should keep the partition «Non-English language mailing lists»,
I guess we should either add the other languages or remove all of them :)

[derickr]

@saundefined I don't always manage to read things before "the end of the week", but this looks OK to me too.