Revert "Generate manpages and html files from AsciiDoc."
Revert "Generate manpages and html files from AsciiDoc."

This reverts commit 8b2b034fb79d9201300b8c2f677c35afef172f1f.

Breaks distcheck.

dicej/icewm,dicej/icewm,dicej/icewm,dicej/icewm