IMO, this recipe should be just dropped, but sadly, we still have
a few recipes using pip :-(. I consider using pip on recipes a
big NO NO, and I think we should avoid it.
Besides that...
`pip` moves too fast for us to properly keep up, and installing
pip for whatever Python version is as simple as doing:
> python3.xx -m ensurepip --altinstall
> python3.xx -m pip install --upgrade pip
(replace .xx accordingly, of course)
And then users can just update their pip whenever they like.
This silly typo prevented the inclusion of `/bin/{pip,pip3}`
along with `/bin/pip-3.10` (for the default Python version,
it is always nice to provide non-version-suffixed commands).