go to
C:\Program Files (x86)\Steam\steamapps\workshop\content\108600\2644986930\mods\SlingMod\media\lua\client\Timedactions

and delete the two files in teh folder
"Sling_ISEquipWeaponAction.lua" and "Sling_ISDetachItemHotbar.lua"
when you are done the "Timedactions" folder should be empty

boot up the game and enjoy

if you have problems finding the folder location you can find it IN GAME in the mods desc