Don't include view in Diffusion line permalink

Summary:
Including view in permalink seemed like the correct solution to me.
Instead, I delete it all the time when copying somewhere else.

Test Plan:
Clicked on the link.
Changed view on permalink.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3453