[jakedaw]

I would like to delete widgets right off my Nexus 7, from the tray I have three pages of them and never use them.

[SpookDroid]

From what I understand, those aren't really active widgets, those are just a widget list. If you tap on any of them, you'll be prompted to load a Widget onto your homescreen. And that list cannot be deactivated unless you're using a 3rd party launcher that only displays apps in the App Drawer.