I filed a domestic incident report against my boyfriend, but I would like to drop the charges.What should I do?

Generally, once a Domestic Violence Report is filed, the police, by law, are required to act on it. But, in this case, the only charge is a telephone threat - not a Domestic Violence Incident. In that case, your failure to follow up with the police will probably result in nothing being done. You should call the police and tell them the ex-BF returned the computer, stopped calling, is not making threats, and that the two of you have peacefully parted ways. That should be the end of it.