f - Drop redundant txid comparison

Rely on the surrounding txid-change branch.

This keeps conflict tracking behavior unchanged.

Co-Authored-By: HAL 9000

Author: tnull

src/payment/store.rs

@@ -630,7 +630,7 @@ impl StorableObject for PendingPaymentDetails {
 		if self.txid != update.txid {
 			let old_txid = self.txid;
 			self.txid = update.txid;
-			if old_txid != self.txid && !self.conflicting_txids.contains(&old_txid) {
+			if !self.conflicting_txids.contains(&old_txid) {
 				self.conflicting_txids.push(old_txid);
 			}
 			updated = true;