Unfortunately, with the way WordPress is designed, one plugin cannot manipulate another plugin.
So you'll have to do a "hack".
The best way is to modify the slider plugin and have it only show if it is not a mobile device.
The nice part is the WP Mobile Detector gives you access to a value inside the wp query object as well as a cookie you can check against.
You could also put JavaScript in the footer that hides the slider, or removes it from the page if you'd like.
