Revert "Add metadata object to repo location successes and failures"
Summary: This reverts commit 853e16ab06766a1a505dbcad66cfd261fb6547b8. I'm going to rethink this setup a bit after talking more with dish.
Test Plan: BK
Reviewers: dish, prha
Reviewed By: dish
Subscribers: prha
Differential Revision: https://dagster.phacility.com/D7996