Removed "PHID Types" storage object and interface components
Summary:
Removed because code wasn't used or really needed.
Test Plan:
- Tested that "PHID List" and "PHID Lookup" pages work correctly.
- Tested that new PHIDs can be allocated with the predefined set of types
Reviewed By: epriestley
Reviewers: epriestley
CC: epriestley
Differential Revision: 88