[gnome-documents] build: Remove autotools

[Iñigo Martínez <inigomartinez src gnome org>]

commit 673b0a65883666a922cfa18f263636eee385e60b
Author: Iñigo Martínez <inigomartinez gmail com>
Date:   Wed Aug 30 13:33:50 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=787013

 Makefile.am                 |   61 ---------
 autogen.sh                  |   39 ------
 configure.ac                |  162 ------------------------
 data/Makefile.am            |   79 ------------
 data/icons/Makefile.am      |   87 -------------
 getting-started/Makefile.am |   16 ---
 git.mk                      |  285 -------------------------------------------
 help/Makefile.am            |   28 ----
 m4/getting-started.m4       |  130 --------------------
 man/Makefile.am             |   24 ----
 po/Makevars                 |   78 ------------
 src/Makefile.am             |  123 -------------------
 12 files changed, 0 insertions(+), 1112 deletions(-)