'Deletes a static route associated with a VPN connection between an
existing virtual private gateway and a VPN customer gateway. The static
route allows traffic to be routed from the virtual private gateway to
the VPN customer gateway.
:type destination_cidr_block: str
:param destination_cidr_block: The CIDR block associated with the local
subnet of the customer data center.
:type vpn_connection_id: str
:param vpn_connection_id: The ID of the VPN connection.
: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_vpn_connection_route(self, destination_cidr_block, vpn_connection_id, dry_run=False):

    params = {'DestinationCidrBlock': destination_cidr_block, 'VpnConnectionId': vpn_connection_id}
    if dry_run:
        params['DryRun'] = 'true'
    return self.get_status('DeleteVpnConnectionRoute', params)
