Peter Pan said:
Well I would not just cut Kamino, but change and reorder most of the first half of the movie.
Indeed, the movie has very little decent action on the first part (the city chase is poor).
So the fight on Kamino needs to stay. Perhaps move it to the beginning so that you have:
» Open with Obi-wan at Kamino
» Fight with Jango
» Coruscant with the usual Padme stuff
» Bar sequence, Obi-wan sees Jango again
» Obi-wan goes to Geonosis chasing Jango