First, you want to install a registry script to take ownership of the files/folders - go
here
and download the zip. Contents are self-explanatory.
You will now have a right click option to take ownership of files and folders. Using this on the ReShade folder first should allow you to delete it afterwards, but the file you want to delete/rename is
dxgi.dll in
PUBG\TslGame\Binaries\Win64. Removing that effectively stops reshade from even starting while keeping your profile intact.