Terminating an alliance

I made a mistake, and started an alliance, but I picked the wrong airline to sign on. 2 of 3 have signed on, but the other one isn't. How do I rectify this?  I need the other dude gone, or discontinue the alliance somehow.  There's no button for "make other member disappear from alliance."   or even to discontinue or dissolve an alliance. I just want to start this whole alliance thing over again.  The alliance is called "NORTH AMERICA JETS" and is in Ellikinon.   (please don't tell me to read the blogs or forums - I'm already doing that.)  Thank You

LAX AIR

Simply quit from the Alliance. If all members have left, the alliance will most likely cease to exist