Hi. There are a couple of steps (well, 3 now that I think of it) to this.
a) list the packages updated from 01.org. They're recorded in the update tool log
in /var/tmp/… put you can be sure this way (it will be a bit slow if you
have lots of packages installed):
dpkg-query -f '${binary:Package}\n' -W | \
while read pkg; do apt-cache madison $pkg | head -n 1; done | \
grep -F 01.org | tee updated-packages.txt
b) remove the 01.org repository from your configuration:
sudo rm -i /etc/apt/sources.list.d/intellinuxgraphics.list
sudo apt-get update
c) for each package listed above (re)install the current/most-recent version now available:
apt-get install --reinstall $(while read pkg x; do echo $pkg/xenial; done < updated-packages.txt)
That should do the trick.

Hello!
I used the Intel Graphics Update Tool 2.0.2 on Ubuntu 16.04 and it worked without problems. However, I wanted to know how I can remove the drivers installed by this utility and reinstall the original Ubuntu drivers, since I did not notice any improvement in graphics performance.
Thanks in advance for the help!