Only Medieval and Neolithic weapons are used, all others are disabled (not removed).
Will throw errors while loading.
Will not give desired result on DLC weapons.
No weapons at all: https://steamcommunity.com/sharedfiles/filedetails/?id=2000097060
Revision 2: All units, including mechanoids now carry primitive weapons. (version 1.2 and higher only)
The weapons are not actually removed from the game, but no longer used.
Compatibilty and quality disclaimer
This mod was made quickly, for fun. It overrides vanilla weapons. It works fine, but no effort was made to ensure compatibility. Due to it's simplicity it shouldn't be able to do any harm to saves. As long as other mods used do not patch or depend on the vanilla weapons and/or mechanoid system there should be no problems.