This reverts commit 65a333600d.
This wasn't tested for correctness with something like fodwatch [0],
and should not have been (self-)merged so quickly, especially without
further review.
It also resulted in the breakage of at least one package [1] (and that's
the one we know of and was caught).
A few packages that were updated in between this commit and this revert
were not reverted back to using `rev`, but other than that, this is a
1:1 revert.
[0]: https://codeberg.org/raphaelr/fodwatch
[1]: https://github.com/NixOS/nixpkgs/pull/396904 / 758551e458
Packages, applications, and services based on Python 2 are no longer supported and are being removed. If you require a Python 2 based package, you can include that package in your own local repository.
Some packages may continue to be maintained for internal use by nixpkgs, but they should not be used by new public packages.
a19cd4ffb1