R1:1e1ad070b6b0

Delete two unused variables

Summary: `image` has been replaced with `active_image`. `imageData` is from a long time ago, I think.

Test Plan: Verified nothing seems to be broken.

Reviewers: chad, ljalonen

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D5084