repo: Drop internal GFile config_file
repo: Drop internal GFile config_file

The remote parsing code still uses GFiles but this is a start.

Closes: #432
Approved by: giuseppe

gatispaeglis/ostree,gatispaeglis/ostree,GNOME/ostree,gatispaeglis/ostree,GNOME/ostree,gatispaeglis/ostree,gatispaeglis/ostree,GNOME/ostree,GNOME/ostree,GNOME/ostree,gatispaeglis/ostree