You can't drop charges if the restraining order is "temporary." However, you can file paperwork and attempt to talk to a judge if you have a "permanent" restraining order that you believe should be dropped.
If you have a temporary restraining order and a court hearing coming up, you cannot “drop” the case. ... If you already have a “permanent” restraining order and you want to dismiss (drop) the case or change the restraining order, you must file papers to go to court and ask the judge.