EDIT: There currently is no solution. It turns TextMate 2 doesn't maintain the ability to insert the "kill buffer" with ^Y. While it is possible to rebind a ^Y to "Paste" (command-V), I want the emacs behavior of inserting the "kill buffer".
The shortcut that inserts the "TODO" using ^y interferes with the emacs yank command. I uninstalled the TODO bundle, and couldn't find anything named "todo" or that had the shorctut ^y when I used the menu command, "Select Bundle Item...".