Further deprecation of deprecated sprite groups

[Matiiss]

Follow through of #2036

[Starbuck5]

These things were always minor, but this is still a compatibility break. I don't think they should be removed.

Updating docs and tutorials to not mention them is fine, seems like a good idea.

[Matiiss]

These things were always minor, but this is still a compatibility break. I don't think they should be removed.

Updating docs and tutorials to not mention them is fine, seems like a good idea.

I was just following the contents of the deprecation warnings, which were put there by MyreMylar. Also, I don't see that much harm in removing these particular groups, since they're just aliases, those few few people who actually use them and at some later point move over to pygame-ce can just do a find and replace and change the names to Group or that other group. Which obviously is less convenient than not having to do that, but we'd at some point remove them anyway (or at least should) and someone like that could still switch over after that happens and they'd have to do that find and replace thing anyway.

[Starbuck5]

I was just following the contents of the deprecation warnings, which were put there by MyreMylar

I didn't notice the deprecation warnings said that. That should be changed.

those few few people who actually use them and at some later point move over to pygame-ce can just do a find and replace and change the names to Group or that other group

When you recommend someone switches over to pygame-ce, don't you want to be able say "it won't break your code" with the highest confidence?

[Matiiss]

Alright, added back the functional bits to maintain compatibility and changed deprecation warnings to just inform users that the features will be removed in a future version.

[MyreMylar]

LGTM 👍

[Starbuck5]

Changes make sense, thanks for the PR.