R1:6cb01374a590

Remove previous-generation Phame Conduit API methods

Summary: Ref T9897. We can now provide modern `search` and `edit` endpoints (I'll do this next).

Test Plan: Grepped for removed methods.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T9897

Differential Revision: https://secure.phabricator.com/D14898