Hygiene: Refactor tests / jshintrc to not use globals

Changes:
* Restore lead photo init tests
* Restore toggling accessibility tests
* Remove languages tests that are no longer run nor relevant (this relates to the old
language code when we served languages in html)
* Remove fixtures

Bug: 71714
Change-Id: I0d7f26ebab3550e184c70dca5886afac1cbaaf50