'Deletes a route entry from the route table.
:param      route_table: The route table to delete the route from.
:type       route_table: :class:`.EC2RouteTable`
:param      cidr: The CIDR block used for the destination match.
:type       cidr: ``str``
:rtype:     ``bool``'

def ex_delete_route(self, route_table, cidr):

    params = {'Action': 'DeleteRoute', 'RouteTableId': route_table.id, 'DestinationCidrBlock': cidr}
    res = self.connection.request(self.path, params=params).object
    return self._get_boolean(res)
