dbus_connection_dispatch: remove dead code

There's no way pending can be non-NULL here; if it was, we'd have jumped
straight past this block (getting filters from the connection), because
replies to pending calls don't go through filters.

Bug: https://bugs.freedesktop.org/show_bug.cgi?id=33128Reviewed-by: Cosimo Alfarano <cosimo.alfarano@collabora.co.uk>

dbus/dbus-connection.c

@@ -4613,9 +4613,6 @@ dbus_connection_dispatch (DBusConnection *connection)
       /* unlocks and calls user code */
       _dbus_connection_update_dispatch_status_and_unlock (connection,
                                                           DBUS_DISPATCH_NEED_MEMORY);
-
-      if (pending)
-        dbus_pending_call_unref (pending);
       dbus_connection_unref (connection);
       
       return DBUS_DISPATCH_NEED_MEMORY;