f remove stale comment val pointed out

Author: TheBlueMatt

lightning/src/ln/channelmanager.rs

@@ -3058,8 +3058,6 @@ impl<ChanSigner: ChannelKeys, M: Deref + Sync + Send, T: Deref + Sync + Send, K:
 		}
 
 		for (source, payment_hash, reason) in timed_out_htlcs.drain(..) {
-			// Call it incorrect_or_unknown_payment_details as the issue, ultimately, is that the
-			// user failed to provide us a preimage within the cltv_expiry time window.
 			self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), source, &payment_hash, reason);
 		}
 		self.latest_block_height.store(height as usize, Ordering::Release);