<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def delete_feed(self, pid):
 """Delete a feed, identified by its local id. Raises [IOTException](./Exceptions.m.html#IoticAgent.IOT.Exceptions.IOTException) containing the error if the infrastructure detects a problem Raises [LinkException](../Core/AmqpLink.m.html#IoticAgent.Core.AmqpLink.LinkException) if there is a communications problem between you and the infrastructure `pid` (required) (string) local identifier of your feed you want to delete """

        logger.info("delete_feed(pid=\"%s\") [lid=%s]", pid, self.__lid)
        return self.__delete_point(R_FEED, pid)