R1:fcd85b6d7bed

Replace "getRequestURI()->setQueryParams(array())" with "getPath()"

Summary:
Ref T13250. A handful of callsites are doing `getRequestURI()` + `setQueryParams(array())` to get a bare request path.

They can just use `getPath()` instead.

Test Plan: See inlines.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13250

Differential Revision: https://secure.phabricator.com/D20150