option cleanup: --dev-bitcoind-poll

Make --bitcoind-poll a dev option.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

lightningd/lightningd.c

@@ -395,7 +395,6 @@ int main(int argc, char *argv[])
 	/* Initialize block topology (does its own transaction) */
 	setup_topology(ld->topology,
 		       &ld->timers,
-		       ld->config.poll_time,
 		       blockheight);
 
 	/* Create RPC socket (if any) */