docs: def remove_watcher(self, issue, watcher):
          """Remove a user from an issue's watch list.
  
          :param issue: ID or key of the issue affected
          :param watcher: username of the user to remove from the watchers list
          :rtype: Response
          """
          url = self._get_url('issue/' + str(issue) + '/watchers')
          params = {'username': watcher}
          result = self._session.delete(url, params=params)
          return result