Makefile: Remove cleanup of ruby/
We deleted a bunch of files and directories related to the Ruby sidecar,
but some of them were mentioned in .gitignore. This caused git to never
remove them. For that reason we introduced a target clean-ruby
which
was called by build
and clean
to make sure these files get deleted
some way or the other.
Because that target has been around for a couple of releases now, it should have done it's duty, and it's safe to retire it.
Milestone: 16.3 Label: maintenance::removal