f drop spurious todo that is now redundant

Author: TheBlueMatt

lightning/src/ln/onion_utils.rs

@@ -672,8 +672,6 @@ impl HTLCFailReason {
 				// failures here, but that would be insufficient as find_route
 				// generally ignores its view of our own channels as we provide them via
 				// ChannelDetails.
-				// TODO: For non-temporary failures, we really should be closing the
-				// channel here as we apparently can't relay through them anyway.
 				if let &HTLCSource::OutboundRoute { ref path, .. } = htlc_source {
 					(None, Some(path.first().unwrap().short_channel_id), true, Some(*failure_code), Some(data.clone()))
 				} else { unreachable!(); }