[hitori] build: Remove GNOME_MAINTAINER_MODE_DEFINES

[Philip Withnall <pwithnall src gnome org>]

commit 4498b2f8313a8bab3eef95f215e01d8863580ff4
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Wed Mar 11 12:14:39 2015 +0000

    build: Remove GNOME_MAINTAINER_MODE_DEFINES
    
    It does nothing relevant any more.
    
    https://wiki.gnome.org/Projects/GnomeCommon/Migration

 configure.ac |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 4077f38..2ff8f07 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,7 +17,6 @@ LT_INIT
 m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
 
 GNOME_COMPILE_WARNINGS([maximum])
-GNOME_MAINTAINER_MODE_DEFINES
 
 # Code coverage
 AX_CODE_COVERAGE()