libnetwork/drivers/remote: driver.DeleteNetwork: remove var that collided

Remove the var, because `delete` is a builtin.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

libnetwork/drivers/remote/driver.go

@@ -169,8 +169,7 @@ func (d *driver) CreateNetwork(id string, options map[string]interface{}, nInfo
 }
 
 func (d *driver) DeleteNetwork(nid string) error {
-	delete := &api.DeleteNetworkRequest{NetworkID: nid}
-	return d.call("DeleteNetwork", delete, &api.DeleteNetworkResponse{})
+	return d.call("DeleteNetwork", &api.DeleteNetworkRequest{NetworkID: nid}, &api.DeleteNetworkResponse{})
 }
 
 func (d *driver) CreateEndpoint(nid, eid string, ifInfo driverapi.InterfaceInfo, epOptions map[string]interface{}) error {