gio/fam: Remove leftover debug print

This leftover debug print was introduced by d682df186e9cca2b8db0e921450a4db31cf0c467
and is obviously bad for applications that are expecting something
else on stdout, etc.

See: https://bugzilla.redhat.com/show_bug.cgi?id=1396386

https://bugzilla.gnome.org/show_bug.cgi?id=780144
1 file changed