[gtk+] docs: remove defsformat.txt

[Matthias Clasen <matthiasc src gnome org>]

commit 65db1100ecae9d0878be95eaba92cc3612bfe8cf
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Sep 23 22:19:35 2010 -0400

    docs: remove defsformat.txt
    
    We should not ship documentation for file formats we are no longer
    using.

 docs/defsformat.txt |  338 ---------------------------------------------------
 1 files changed, 0 insertions(+), 338 deletions(-)