[gjs] build: Remove GNOME_MAINTAINER_MODE_DEFINES

[Philip Chimento <pchimento src gnome org>]

commit cbe0ddd1730eec9e492beb0bb2bdeca589b6dcfd
Author: Philip Chimento <philip chimento gmail com>
Date:   Mon Sep 26 20:40:28 2016 -0700

    build: Remove GNOME_MAINTAINER_MODE_DEFINES
    
    This macro does not do anything relevant anymore. See:
    https://wiki.gnome.org/Projects/GnomeCommon/Migration
    
    https://bugzilla.gnome.org/show_bug.cgi?id=772027

 configure.ac |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index e1ba7eb..a887adb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,7 +44,6 @@ dnl DOLT
 AC_C_CONST
 
 GNOME_CXX_WARNINGS([maximum])
-GNOME_MAINTAINER_MODE_DEFINES
 
 # coverage
 AC_ARG_ENABLE([coverage],