Remove AMD Testing Use Only Watermark with one click for Ubuntu or any Linux

If you are using Linux and AMD Beta drivers, you will notice AMD Testing Use Only or Unsupported Hardware watermark at bottom right corner. No worries. Deleting it is easy!

How to?
1- Download this script.
2- Run it as superuser and reboot.

Have fun!

For newbies:
How to run the script as superuser? Open terminal, type sudo sh, don't press enter, and drag-drop the script file to terminal window, press enter.

Example: sudo sh '/home/username/Downloads/amd_remove_unsupported.sh'