Allow device bindings to be destroyed
Summary: Ref T9762. Currently it is not possible to destroy an Alamanac device because any associate bindings cannot be destroyed.
Test Plan: Destroyed an Almanac device.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: Korvin
Maniphest Tasks: T9762
Differential Revision: https://secure.phabricator.com/D14461