R1:b711407b172a

Remove wiki move explanation in projects

Summary: I assume we've shown this long enough, plus with redesign it's a good time to remove.

Test Plan: reload page, no link

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Differential Revision: https://secure.phabricator.com/D11394