For example, the first one that you have marked with a ? is for Ctrl+L which you've set up with the script for changing the light direction.

That's not really needed anymore with the new v2 release since there is a much improved lighting system now that avoids dark areas.

Just click inside that Ctrl+L entry and hit the Delete button at the top there (next to Add) to get rid of it, there isn't any reason to use that with the latest v2 release.

- Michael