Missing .js files

[domenic]

The following show up as 404s in the console:

• updater.js
• reviewer.js
• status.js

The source also contains code to load

• toc.js

Some of these are presumably related to the notification about updates, which has been removed in aaa19d5. So we should maybe remove them too?

Others we should get from @Hixie.

[Hixie]

Nuke them all, they're all obsolete. updater.js was the revision.dat monitoring script that told you when the spec was updated. reviewer.js was the bug reporting script (the box in the bottom left). status.js used to display the boxes in the margin, and then later also managed the topic subscriptions, which we lost in the move to github. toc.js used to generate the minitoc but wattsi has been doing that for a while.