Summary: Ref T5245. These were a bad idea. We no longer need actors for edge edits either, so remove those. Generally, edges have fit into the policy model as pure/low-level infrastructure, and they do not have any policy or capability information in and of themselves. Test Plan: `grep` Reviewers: chad, btrahan, joshuaspence Reviewed By: joshuaspence Subscribers: epriestley Maniphest Tasks: T5245 Differential Revision: https://secure.phabricator.com/D9840