Remove Command-T in Finder?

It seems I can add/remove/replace any key command in the Finder, great - but, if it doesn't have a menu option that is proving harder to do.

Anyone have any clues on how to remove a key command that isn't a menu item?
Specifically the Cmd-T to add an item to the side bar - the number of times I've done that instead of getting a new tab in Safari, after switching Spaces & not checking for which is frontmost, it's driving me insane.

Ummm... that command is in the Finder menu. At least it is in Mountain Lion. File » Add to Sidebar

D'oh! Found it. You ever get one of those times when you just know you searched every menu diligently, yet somehow the one you're searching for simply eludes you?
Thank you.