code: def delete_key(self, key_id):
          
          if int(key_id) <= 0:
              return False
          url = self._build_url('keys', str(key_id), base_url=self._api)
          return self._boolean(self._delete(url), 204, 404)
docs: Delete the key with the specified id from your deploy keys list.
  
          :returns: bool -- True if successful, False otherwise