Update team switches for frontend

[cemms1]

We should clean up the frontend switchboard a bit.

As an example, the Journalism switches have owners of "journalism team". These should be updated with the appropriate team to notify. We should also remove the expired switches as well as those which have not been changed in a long time (I suspect most of these, if not all?)
https://frontend.gutools.co.uk/dev/switchboard#Journalism

[shesah]

Perhaps we could timebox an hour each week and see how we get on?