'.. http:delete:: /channels/subscribed/(string: channelid)
Unsubscribe from a specific channel. Returns error 404 if you are not subscribed to this channel.
**Example request**:
.. sourcecode:: none
curl -X DELETE http://localhost:8085/channels/subscribed/da69aaad39ccf468aba2ab9177d5f8d8160135e6
**Example response**:
.. sourcecode:: javascript
"unsubscribed" : True
:statuscode 404: if you are not subscribed to the specified channel.'

def render_DELETE(self, request):

    request.setHeader('Content-Type', 'text/json')
    channel_info = self.get_channel_from_db(self.cid)
    if (channel_info is None):
        return ChannelsModifySubscriptionEndpoint.return_404(request)
    if (channel_info[7] != VOTE_SUBSCRIBE):
        return ChannelsModifySubscriptionEndpoint.return_404(request, message=NOT_SUBSCRIBED_RESPONSE_MSG)
    def on_vote_done(_):
        request.write(json.dumps({'unsubscribed': True}))
        request.finish()
    self.vote_for_channel(self.cid, VOTE_UNSUBSCRIBE).addCallback(on_vote_done)
    return NOT_DONE_YET
