remove unneccessary collection data fix up

fixes CNVS-11620

test plan
 - run migrations
 - should not error

Change-Id: I63e137f3c3154d1c0b64d2bbfd110a26f748a1f2
Reviewed-on: https://gerrit.instructure.com/31304
Reviewed-by: Cody Cutrer <cody@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
Product-Review: Rob Orton <rob@instructure.com>
QA-Review: Rob Orton <rob@instructure.com>