R1:c91253c69174

Remove "MetaMTA Transcripts" and "Herald Transcripts" links from Differential

Summary: These actions are dumb, and not smart, and no one likes them.

Test Plan: Looked at a revision and saw fewer actions; higher average action quality.

Reviewers: chad

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D5304