[devhelp] build: Do not EXTRA_DIST autogen.sh

[Sébastien Wilmet <swilmet src gnome org>]

commit 3168964dab50493d20bab891d20a2e76a5623db9
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Thu Nov 10 17:26:21 2016 -0600

    build: Do not EXTRA_DIST autogen.sh
    
    It serves no purpose in tarballs. autoreconf is easy enough to use
    directly.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=774069

 Makefile.am |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 93e7ebd..d57e8d3 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -4,5 +4,3 @@ AM_DISTCHECK_CONFIGURE_FLAGS =  \
        --disable-Werror
 
 SUBDIRS = po src data misc contrib docs
-
-EXTRA_DIST = autogen.sh