bug 1230604 - Stop checking contents of 404 page
bug 1230604 - Stop checking contents of 404 page

django-oauth-toolkit will add a new 404 page template, breaking tests
that assert the content of the 404 page. The status code check should be
sufficient.

jwhitlock/web-platform-compat,mdn/browsercompat,jwhitlock/web-platform-compat,jwhitlock/web-platform-compat,mdn/browsercompat,mdn/browsercompat