A while ago i downloaded the tron glove replacement for the physgun.
if you dont know what the tron gloves are go here > http://www.garrysmod.org/downloads/?a=view&id=42354
I want to remove them for the original physgun but i cant.
its was a while back when i put the files in the folders but i cant remember which ones. 
any help is welcome.
Find which folder its in and delete it, other than that theres not much else you can do (try searching for v_physgun or w_physgun, also remember to remove the materials) 
Edit: oh wow, i’ve been looking for something like that, thanks 
Edit 2: Found this in the files in that pack (Uninstalling_gloves.txt):
How to uninstall the gloves
First, navigate to this directory:
X:\program Files\Steam\steamapps\username\garrysmod\garrysmod
And these are the files you need to delete:
Materials\Sprites\d_glow.vtf
Materials\Sprites\orangecore1.vmt
Materials\Sprites\orangecore1.vtf
Materials\Sprites\orangelight1.vmt
Materials\Sprites\orangelight1.vtf
Materials\Sprites\physg_glow1.vmt
Materials\Sprites\physg_glow2.vmt
Models\Weapons\v_physcannon (there should be 5 files that have this name. like "v_physcannon.dx80.vtx", delete them all)
Models\Weapons\v_superphyscannon.mdl
Materials\Models\Weapons\v_hand\v_hand_sheet.vmt
and The Tron-Gloves Folder in \addons\
(editied out patronising rubbish)
Yeah i realized that after i redownloaded it.
Thanks anyway.