Revert "Add "state icons" to ObjectItemListView"

Summary: This reverts commit e70bb28ea00d16b4fac634edbbcb55d5b574126f. We didn't end up using these.

Test Plan: Looked at Differential.

Reviewers: chad

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D6357