My contacts list on the iPhone was out of control, there were hundreds of old contacts in there from places I used to work. Deleting them on the iPhone is a huge PITA, so I got "smart" and did so in the Contacts app on my Mac, which gets its list from iCloud. However, they're all still on the phone. I assume this is because they are local copies, not iCloud ones. Is there a way to delete all the local contacts and re-sync to iCloud?