<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def removePeer(self):
 """ Removes a peer by URL from this repo """

        self._openRepo()

        def func():
            self._updateRepo(self._repo.removePeer, self._args.url)
        self._confirmDelete("Peer", self._args.url, func)