Remove category checks

[andrewnicols]

We need to decide what we're doing here about Moodle 4.1 and earlier.
At what point do we remove these checks? Do we really need to check category on 4.1 and earlier given it's in sec support only now.

4.2 includes our new apis.json file.

[stronk7]

We have 2-3 options here:

1. Proceed with the removal now (once the moodle-cs counterpart has landed). Moodle <= 4.1 will stop checking it.
2. Keep the category checks as they are until the very end of the moodle-cs milestone and only remove it at the end. Moodle >= 4.2 problems will be reported by both tools.
3. Adjust the category checks to only work for Moodle <= 4.1 (requires to inspect version.php and so on, not sure if, maybe, we are already doing that elsewhere). And keep it till the end. No dupes with moodle-cs.

If the 3rd alternative is going to be hard (although it may be a good general path to follow with a lot of checks), then I'd say that the 2nd one is my personal best one. Better report twice than none.

Ciao :-)

[stronk7]

This (or whatever we agree to do) will be applied after moodlehq/moodle-cs#112 has landed.

[andrewnicols]

After thinking things through, we are including the 4.2 version of the apis.json into the moodle-cs repo for versions which do not have the file. This can land and we don't need to do any version checks etc.