If you have a temporary restraining order, you may file an ex parte application with the court to request the termination of your temporary restraining order prior to your court hearing. If you've changed your mind and don't feel you have the need for the restraining order, you can also simply not appear at your hearing, which will result in a a dismissal of your request.
If you have a restraining order after hearing, you may file a Request for Order with the court to request the termination of your restraining order after hearing.