Revert "Enable job queue to process notification on all wikis"

test/test2 wiki is not a suitable testcase given that it
barely produces any notifications. This should have a more
progressive rollout.

This reverts commit 0b114c7289237fb1c936b404c83c6e383b1cd59f.

Change-Id: I3935c8d71c94985e3439386df5aeb7420e17e4fd