Remove unused file transforms
Summary:
Ref T7707.
- Modernize the file transform endpoint a bit.
- Delete transforms which are no longer used in the product.
Test Plan:
- Used Pholio (navigation, inline thumbs).
- Uploaded images (embed thumb).
- Changed profile picture (profile thumb).
Reviewers: btrahan
Reviewed By: btrahan
Subscribers: epriestley
Maniphest Tasks: T7707
Differential Revision: https://secure.phabricator.com/D12807
