Unused code

(cherry picked from commit c2c31b4339fa8d4e3eacc8f521f5ae0889a09fb0)

Source commit: b3892ca684f6864f901094633ec75b3e8b867442

source/putty/ssh2transport.c

@@ -2086,8 +2086,3 @@ void get_macs(int * count, const struct ssh2_macalg *** amacs)
     *amacs = macs;
     *count = lenof(macs);
 }
-
-void call_ssh_timer(Backend * be)
-{
-    // TODO
-}