'Deletes a route from a route table within a VPC.
:type route_table_id: str
:param route_table_id: The ID of the route table with the route.
:type destination_cidr_block: str
:param destination_cidr_block: The CIDR address block used for
destination match.
:type dry_run: bool
:param dry_run: Set to True if the operation should not actually run.
:rtype: bool
:return: True if successful'

def delete_route(self, route_table_id, destination_cidr_block, dry_run=False):

    params = {'RouteTableId': route_table_id, 'DestinationCidrBlock': destination_cidr_block}
    if dry_run:
        params['DryRun'] = 'true'
    return self.get_status('DeleteRoute', params)
