Allow pastes to be destroyed
Summary: Fixes T6186.
Test Plan:
- Used bin/remove destroy Pxxx to destroy a paste.
- Verified file, transactions, etc., were destroyed.
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T6186
Differential Revision: https://secure.phabricator.com/D10563