[gnome-session] build: Remove autotools

[Bastien Nocera <hadess src gnome org>]

commit ffb1f23d3e5fb99c5a41a73218084250af7215a9
Author: Iñigo Martínez <inigomartinez gmail com>
Date:   Sun Sep 17 22:31:14 2017 +0200

    build: Remove autotools
    
    To avoid the burden of maintaining multiple build systems, this
    patch removes autotools support.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=787806

 Makefile.am               |   47 -----
 autogen.sh                |   21 ---
 configure.ac              |  412 ---------------------------------------------
 data/Makefile.am          |   65 -------
 doc/Makefile.am           |    9 -
 doc/dbus/Makefile.am      |   49 ------
 doc/man/Makefile.am       |   30 ----
 git.mk                    |  227 -------------------------
 gnome-session/Makefile.am |  222 ------------------------
 tools/Makefile.am         |  106 ------------
 10 files changed, 0 insertions(+), 1188 deletions(-)