(CE-482) Comment out proxy for RSS feeds

RSS feeds are currently always returning an error message. This is fixed
by removing the Wikia change that sets a proxy for it. Leaving it
commented rather than removing it as we may want to revert this once the
proxy issues are resolved.

This is basically the same issue behind https://github.com/Wikia/app/pull/1994

@lgarczewski @Wikia/community-engineering