[Live-demo] Dropping broken packages from OSGeo-Live 10.5

Hi Cesium Dev Folks,

OSGeo-Live is a Live DVD which has lots of projects similar to Cesiumjs. I wrote a small installation script for cesium a few years ago. Now some features are broken [1]. I would like someone in the community to help fix it. Are there any takers? Cameron Shorter in the CC list helps coordinating and maintaining that distro.

[1] - https://trac.osgeo.org/osgeo/ticket/1898