Remove Space Odyssey copy from error pages

While funny, some people who report bugs appear not to get the
reference, which might lead them to feel insulted. Quoting the
description of the Bugzilla keyword "ux-tone" used by the user
experience team:

    User experience principle: interfaces should not blame the user, or
    communicate in a way that is overly negative or dramatic.
Merge pull request #2257 from openjck/nix-space-odyssey

Remove Space Odyssey copy from error pages