Treatment for removal of a bone spur on the talus?

Depends on where: The spur is. Most spurs on the talus are posterior, which is a relatively easy access point for surgery. To give you a general answer to your general question, though, the treatment for a bone spur is surgical removal. Needless to say, if this is not causing pain, don't have surgery!

Surgical: If painful the only treatment is surgical removal, usually done on an outpatient basis.