Fix PyFlakes warnings in Review Board.

Review Request #5459 — Created Feb. 11, 2014 and submitted — Latest diff uploaded

Information

Review Board
master
d8a637b...

Reviewers

Fix PyFlakes warnings in Review Board.

We had a number of PyFlakes warnings from recent changes that weren't
addressed. This cleans them all up, getting back to 0 warnings or
errors.

Ran pyflakes and didn't see any more errors.

Unit tests passed.