Remove "bin/repository edit" workflow
Summary:
Ref T10748. In D14250#158181, I accepted this conditional on removing it once Conduit could handle it.
Conduit can now handle it, or at least will be able to as soon as T10748 cuts over.
Test Plan: Grepped for repository edit.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T10748
Differential Revision: https://secure.phabricator.com/D15839