code: def del_uid(self, search):
          
          u = self.get_uid(search)
  
          if u is None:
              raise KeyError("uid '{:s}' not found".format(search))
  
          u._parent = None
          self._uids.remove(u)
docs: Find and remove a user id that matches the search string given. This method does not modify the corresponding
          :py:obj:`~pgpy.PGPUID` object; it only removes it from the list of user ids on the key.
  
          :param search: A text string to match name, comment, or email address against
          :type search: ``str``, ``unicode``