dbus-glib: nowadays works with libxml2 backend as well

So get rid of expat dependency.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/dbus-glib/Config.in

@@ -1,7 +1,6 @@
 config BR2_PACKAGE_DBUS_GLIB
 	bool "dbus-glib"
 	depends on BR2_PACKAGE_DBUS
-	depends on BR2_DBUS_EXPAT
 	depends on BR2_USE_WCHAR # glib2
 	select BR2_PACKAGE_LIBGLIB2
 	help
@@ -9,8 +8,5 @@ config BR2_PACKAGE_DBUS_GLIB
 
 	  http://www.freedesktop.org/software/dbus
 
-comment "dbus-glib needs dbus to be compiled with expat support"
-	depends on BR2_PACKAGE_DBUS && !BR2_DBUS_EXPAT
-
 comment "dbus-glib requires a toolchain with WCHAR support"
 	depends on BR2_PACKAGE_DBUS && !BR2_USE_WCHAR