On a d-u today, I saw this:
Calculating upgrade... Done
The following packages were automatically installed and are no longer required:
libdrm-dev libgles1 libglvnd-core-dev libglvnd-dev libopengl0 libx11-xcb-dev libxcb-dri2-0-dev
libxcb-dri3-dev libxcb-glx0-dev libxcb-present-dev libxcb-randr0-dev libxcb-render0-dev libxcb-shape0-dev
libxcb-sync-dev libxcb-xfixes0-dev libxdamage-dev libxfixes-dev libxshmfence-dev libxxf86vm-dev
mesa-common-dev x11proto-damage-dev x11proto-fixes-dev x11proto-xf86vidmode-dev
Use 'apt autoremove' to remove them.
I have not had time to check, but I don't believe such packages as libopengl0 can really be removed. Will need to see whether these removals are safe to do.[/code]