.pre-commit-hooks.yaml: remove the language_version

[Mikaela]

Reuse specifying language_version: python3 means that the hook is executed using the system python3 version and it takes priority over the top level language configuration of the project unlesss the project added explicit override for the reuse hook.

E.g. with:

default_language_version:
  python: pypy3

all other Python3 pre-commit hooks I have would be running with pypy3 with the exception of reuse enforcing python3.

Based on #132, reuse would support pypy outside of pre-commit.

[carmenbianca]

LGTM, thank you!

[carmenbianca]

@Mikaela I think we need to make a new release of reuse before this is of any use to you.

[Mikaela]

Yes, unless I use the commit hash instead of a tag (and lose the ability to pre-commit autoupdate), but I don't think it's so urgent as it will happen eventually with the next release and meanwhile Python 3.12 will work

[Mikaela]

I ended up trying this and it works. Pre-commit.ci now reports using pypy3 while with previous commits it reported using python3 in the build section.

• https://results.pre-commit.ci/run/github/397679519/1697781103.spFlDy26QC6RjdJ97lBD5Q

I also didn't lose pre-commit autoupdate, it just wants to downgrade to the latest tag, so it will be fine at the time of the next release.