Revert "Auto-wrapping explicit escaper for templates"

This reverts commit c90c7080d8004e5001e5ef98aea8ebe4d5573748.

Instead we will be converting to lightncandy, a handlebars implementation
in php.

Change-Id: I122190ef09c26d443c6f5152c9cc09439d5ab689
Merge "Revert "Auto-wrapping explicit escaper for templates""