These two fields allow to specify a different default assignee for ticket opened against
this package in bugzilla. Note: The EPEL field is
always displayed for packages in the 'rpms' namespace regardless of whether it
is used in bugzilla or not.
Drop upstream_branch related spec stuffs
We haven't set using_upstream_branch to 1 since we started using git.
Almost 7 years is a long time to carry something around we aren't using.
Drop the upstream_branch stuff.