delete remote branch

I just merged in my -fdicts-strict work, so I was deleting the old branch… but it's rejected for some reason. $ git push origin --delete dicts-strict remote: performing tab-check... remote: + refs/heads/dicts-strict ghc <my-username> DENIED by fallthru remote: error: hook declined to update refs/heads/dicts-strict To ssh://git@git.haskell.org/ghc.git ! [remote rejected] dicts-strict (hook declined) error: failed to push some refs to 'ssh://git@git.haskell.org/ghc.git' Git gurus chime in? Thanks.