R1:bd3c239d5aad

Remove a stray `setActor()` on EdgeEditor

Summary: These got removed recently but I missed one callsite.

Test Plan: Used `git grep` to double check all other callsites.

Reviewers: joshuaspence

Reviewed By: joshuaspence

Subscribers: epriestley

Differential Revision: https://secure.phabricator.com/D9973