Quick and dirty way : go in module.ini and find the line
"scan_module_sounds = 1"
and put it to 0. You won't hear any other modded sounds though (voice commands, female yells, siege equipment sounds if there are any ...). Might also crash since I only tried this with single player mods
.
Problem is, they didn't added a new sound for drawing/sheathing weapons, but instead used one that is already in the core files. So you can't just replace it in the sound folder. It's probably possible to change it through the module system but it seems a lot of trouble just for a few sounds.
You can also install the more metal sounds mod.