generic: remove unused code

plugins/mm-plugin-generic.c

@@ -168,19 +168,11 @@ mm_plugin_generic_init (MMPluginGeneric *self)
     g_signal_connect (self, "probe-result", G_CALLBACK (probe_result), NULL);
 }
 
-static void
-dispose (GObject *object)
-{
-}
-
 static void
 mm_plugin_generic_class_init (MMPluginGenericClass *klass)
 {
-    GObjectClass *object_class = G_OBJECT_CLASS (klass);
     MMPluginBaseClass *pb_class = MM_PLUGIN_BASE_CLASS (klass);
 
-    object_class->dispose = dispose;
-
     pb_class->supports_port = supports_port;
     pb_class->grab_port = grab_port;
 }