Remove some AphrontPanels
Summary: Removes AphrontPanelViews from UIExamples
Test Plan: Tested new layouts in each of the pages.
Reviewers: btrahan, epriestley
Reviewed By: epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T7427
Differential Revision: https://secure.phabricator.com/D11947