Remove old kio_fonts hack in KCoreDirLister, hostname was stripped incorrectly
https://bugs.kde.org/show_bug.cgi?id=160057 worked around the fact that kio_fonts was creating URLs like fonts://System/, and yet there's no hostname during directory listing afterwards.
Nowadays:
- this hack isn't needed anymore, kio_fonts does fonts:/System/
- removing it actually fixes navigating from
dolphin fonts:/