Remove Greek-Roman wrestling. A ridiculous sport in which NOTHING happens until one wrestler gets called down on all four (which seems to be an advantage so it's kind of a lottery if it goes to a 3rd period). They just stand around and lean on each other when on their feet. Such a bore!
Leg-grab wrestling is stupid too, but only because of the rules. You can win one round and draw the other and have the match called a tie and go to extra-time, even though you out-scored your opponent!
If you challenge a call and it's rejected, your opponent is awarded an additional point.
Greek-Roman wrestling breathe the spirit of Olympism.