Unlink contract (available for Fraikin module)

Example:

https://<address>/api/api.php?cmd=unlink_contract

Parameters:

cmd: unlink_contract

PlateNum: vehicle's number

Method: DELETE

Request:

https://<address>/api/api.php?cmd=unlink_contract&PlateNum=test12345

Answer:

{

"code": 0, "msg": "Deletion is successful"

}