Cleanest way to remove and patch holes from this unused satellite dish on side of house?
Once you remove the dish you can simply fill the holes with silicone caulk. The key is to keep moisture and insects from getting under the siding. There are various colors to choose from. You're not going to get a perfect match but those holes aren't large so probably not a big deal.
The cable can be clipped off at the soffit or pulled out completely.