fixup: remove unused vars in tests

Author: tankyleo

lightning/src/ln/zero_fee_commitment_tests.rs

@@ -111,9 +111,6 @@ fn test_htlc_claim_chunking() {
 
 	let coinbase_tx = provide_anchor_reserves(&nodes);
 
-	let _node_a_id = nodes[0].node.get_our_node_id();
-	let _node_b_id = nodes[1].node.get_our_node_id();
-
 	const CHAN_CAPACITY: u64 = 10_000_000;
 	let (_, _, chan_id, _funding_tx) = create_announced_chan_between_nodes_with_value(
 		&nodes,