Merge branch 'jk/push-delete-ref-error-message' into maint

The error message from "git push $there :bogo" (and its equivalent
"git push $there --delete bogo") mentioned that we tried and failed
to guess what ref is being deleted based on the LHS of the refspec,
which we don't.

* jk/push-delete-ref-error-message:
  push: don't guess at qualifying remote refs on deletion

diff --cc remote.c
Simple merge