Remove dependency on deployment scripts from translationnotifications

misc::maintenance::translationnotifications is declared for two hosts, terbium
and hume. On hume it is set with 'enabled => false' with the helpful comment
that it had been moved to terbium. It should have only been set to false once
(for clean up) and then removed from hume's manifest. I removed it, along with
other long-disabled jobs.

terbium already includes misc::deployment::vars by way of
misc::deployment::scap_scripts, so it's a question of which declaration to
remove. Keeping it via the translationnotifications task would make other cron
jobs dependent on the scap scripts to break if the translationnotification cron
job were ever to be disabled. It makes more sense to declare the dependency at
the outermost level.

Change-Id: I805167af2e7bc8334fe818cac4378ffedacf1330