A mod file disabling the two items is available from:
Only the minimum necessary code is there to remove the items from the game. Current version is 1.0c.
This mod file should remove the items completely. Just open the zip file and extract DLC03_Edit.xml to your mods folder, overwriting any previous version and then making sure Use Mods is turned on in-game.
NOTE: see Reply #7 in this thread.
ALTERNATIVE LINK: http://legendaryheroesmods.stevenaus.fastmail.com.au/