[mutter/wayland] Mutter-Wayland: Define dbus_idle_build_sources once

[David King <davidk src gnome org>]

commit 1bd3a162f8b2e66969342353fc1ff5023a7cc83e
Author: Magdalen Berns <thisMagpie live com>
Date:   Sun Oct 20 21:06:24 2013 +0100

    Mutter-Wayland: Define dbus_idle_build_sources once
    
    Bug https://bugzilla.gnome.org/show_bug.cgi?id=710566

 src/Makefile.am |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/src/Makefile.am b/src/Makefile.am
index 2917202..b2d5584 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -395,7 +395,6 @@ $(dbus_xrandr_built_sources) : Makefile.am xrandr.xml
                --generate-c-code meta-dbus-xrandr                                      \
                $(srcdir)/xrandr.xml
 
-dbus_idle_built_sources = meta-dbus-idle-monitor.c meta-dbus-idle-monitor.h
 
 $(dbus_idle_built_sources) : Makefile.am idle-monitor.xml
        $(AM_V_GEN)gdbus-codegen                                                        \