Is the other fan broken? If not, leave it. If so, cut the power wires and splice them. Don't break it at the soldered joint. Splice the wires and wrap them in some heat shrinking joint connector or use a lot of electrical tape.
Just remember, those PSU's aren't meant to be modified by the layman.
<b>I'm an unhyphenated American.</b>
Intel Q6600 @ 3200 1.4v
Abit IP35 Pro "The Snake"
2x2gb A-Data @ 800
Diamond HD 3870 512mb
Great FORD TRUCK