Summary: Ref T7094. Could just delete this end point too I guess? Needed to add "withCommitPHIDs" to the differentialrevisionquery to get this done.
Test Plan: used diffusion.getcommits from conduit console and got a sensible result for a query for two commits, one with a diff and one without.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T7094
Differential Revision: https://secure.phabricator.com/D11581