In the DistroMap Ruby class in our "script/lib/distro.rb" source file,
we maintain a compatibility matrix of Linux distributions and versions
that we support.  Several scripts that are run by our GitHub Actions
release workflow jobs use the matrix to build and name the Linux
packages we publish on Packagecloud.

We anticipate making a v3.8.0 release of the Git LFS client in the near
future, so we need to update the list of Linux distribution versions
for which we will build RPM and Debian packages.

As one step in this process, we update the entries in our matrix for
several distributions, removing those which have reached the end of
their regular support lifecycles since our v3.7.0 release.

In particular, we remove the OpenSUSE Leap 15.6 and Fedora 42
distribution versions, as they have reached the end of their
respective support lifecycles:

  https://news.opensuse.org/2026/04/01/leap-15-eol/
  https://fedorapeople.org/groups/schedule/f-42/f-42-key-tasks.html