[totem-pl-parser] build: Drop use of GNOME_MAINTAINER_MODE_DEFINES

[Philip Withnall <pwithnall src gnome org>]

commit 7a6a6f0fb9582cd1e4441d3ac22d0e64aadc57be
Author: Philip Withnall <withnall endlessm com>
Date:   Mon Dec 19 08:04:30 2016 +0000

    build: Drop use of GNOME_MAINTAINER_MODE_DEFINES
    
    It is deprecated and doesn’t currently do anything useful.
    
    https://wiki.gnome.org/Projects/GnomeCommon/Migration
    
    https://bugzilla.gnome.org/show_bug.cgi?id=776259

 configure.ac |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index ee4089a..c3dc8d6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -200,7 +200,6 @@ PKG_CHECK_MODULES([TOTEM_PLPARSER_MINI], [gio-2.0])
 
 GNOME_COMPILE_WARNINGS([maximum])
 GNOME_CXX_WARNINGS
-GNOME_MAINTAINER_MODE_DEFINES
 
 if test "$GCC" = "yes" ; then
        CFLAGS="\