Remove specific Mesa graphics packages from live CD

- Removed libgl1-mesa-glx: Mesa GLX OpenGL implementation
- Removed libegl1-mesa: Mesa EGL graphics library
- Removed virtualgl: VirtualGL for 3D acceleration

These packages were removed as requested to reduce the live CD size
while maintaining core Mesa graphics functionality through remaining packages:
- mesa-vdpau-drivers, mesa-vulkan-drivers, mesa-va-drivers
- libglx-mesa0, libegl-mesa0, libgl1-mesa-dri