[devhelp] build: DISABLE_SINGLE_INCLUDES is not used anymore in GLib and GTK+

[Frederic Peters <fpeters src gnome org>]

commit a2c7942cf8c5ad801d151fb166a6c26a46ddea79
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat May 16 16:32:39 2015 +0200

    build: DISABLE_SINGLE_INCLUDES is not used anymore in GLib and GTK+
    
    But it is still used in gdk-pixbuf.

 src/Makefile.am |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index d402079..94c319a 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -24,9 +24,7 @@ AM_CPPFLAGS =                                                 \
        -DLOCALEDIR=\""$(localedir)"\"                  \
        -DDATADIR=\""$(datadir)"\"                      \
        -DG_LOG_DOMAIN=\"Devhelp\"                      \
-       -DG_DISABLE_SINGLE_INCLUDES                     \
        -DGDK_PIXBUF_DISABLE_SINGLE_INCLUDES            \
-       -DGTK_DISABLE_SINGLE_INCLUDES                   \
        $(WARN_CFLAGS)
 
 bin_PROGRAMS = devhelp