Remove fallback 404 route
Remove fallback 404 route

It would match for every route and we would no longer have the intended
behavior of redirecting to ${PROD_URL}${path} if the component isn't
implemented. Implemented routes not marked prodReady would have
redirected correctly.

It would ALSO have broken where we do appLocation.push('https://....')

MoveOnOrg/mop-frontend,MoveOnOrg/mop-frontend