Remove redundant to_bytes

Author: alexfikl

pygit2/remote.py

@@ -137,7 +137,6 @@ def fetch(self, refspecs=None, message=None, callbacks=None, prune=C.GIT_FETCH_P
             * `True` to enable automatic proxy detection
             * an url to a proxy (`http://proxy.example.org:3128/`)
         """
-        message = to_bytes(message)
         with git_fetch_options(callbacks) as payload:
             opts = payload.fetch_options
             opts.prune = prune