Personally I would just leave them. Its not as though they are crowding other plants, just eachother. You will be able to tell the fruit apart.
The bigger worry should be that kiwi are either male and female plants. To get fruit, you need one of each. The flowers are quite different (I grew the big brown fuzzy version when I lived in California) so you need to figure out which you have and add another. If you have a male, you could add 5 or 6 females. If you have a female, you can add a male. I used to take a blooming branch from my male plant and give it to my friend who only had a female plant. She would put it in a bucket of water upwind from her plant. Here is some more information on Hardy Kiwi:
http://tcpermaculture.blogspot...
Daisy
