Remove more cruft from live and installed image
Specifically this stuff:
- Qt5 dev tools not useful for the target audience (KDE devs)
- HP device management apps which don't work because we didn't include PyQt5, and even if we did, no one wants that junk
- Qt V4L2 video capture utility; what even is this?
Fixes #41 (closed)
Edited by Nate Graham