Revert "DA - assignments_needing_submitting"

fixes CNVS-14443

This reverts commit 57427343e320c2c238dc4e0d30c8c21ac0a8caf9.

Change-Id: Ic70da7d96965d368773c2e16c2b49c59f57e5c18
Reviewed-on: https://gerrit.instructure.com/38314
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Simon Williams <simon@instructure.com>
Product-Review: Simon Williams <simon@instructure.com>
QA-Review: Simon Williams <simon@instructure.com>