Remove some old UIExamples
Summary: Ref M1476. I'm going to see if I can set up side-by-side "PHUI" vs "PHUIX" to make maintaining them a touch easier. Before doing that, nuke some really old UI examples that don't seem very useful.
Test Plan: Viewed UIExamples, saw fewer bad ones.
Reviewers: chad
Reviewed By: chad
Differential Revision: https://secure.phabricator.com/D18049