See: https://groups.google.com/d/msg/phonegap/ClZkgVAqhWo/yOn2Be1uVOIJ
We're planning on getting Andrew's plugininstall tool in for 1.9.0 but iOS still ships with the pre-built .framework binary, so this might not work even so to remove any core plugins. I don't think removal from the Cordova.plist will work since I'm assuming Apple has a class dump tool that checks what frameworks your .app links to.
