[glib] Remove outdated/obsolete README

[Emmanuele Bassi <ebassi src gnome org>]

commit 7d3e6738c5dcddad2ea89bcf475915b91a7ac42a
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Nov 27 11:58:19 2017 +0000

    Remove outdated/obsolete README
    
    The README for the API reference top-level is completely obsolete, so we
    should just remove it.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=790896

 docs/reference/README |   63 -------------------------------------------------
 1 files changed, 0 insertions(+), 63 deletions(-)