A fan from the U.K. named Adywan did that and much more. He spent years painstakingly restoring and enhancing every frame of the first Star Wars movie, doing what fans wanted Lucas to do in the first place: clean up and restore the film without adding a bunch of blinking Ewoks. He's currently doing the same to The Empire Strikes Back.
The result is called Star Wars Revisited, and not only does it revert many of the changes made by the Special Editions, but also its picture quality puts the official DVDs and even the Blu-rays to shame.
Hmm. Good, but it could use 30 or 40 useless dancing robots.
Adywan's website lists over 250 changes to the first movie alone, including fixing mistakes that Lucas apparently didn't notice, like making sure the opening titles actually synch up with John Williams' music ...