remove redundant call

Author: accumulator

electrum/plugins/psbt_nostr/qml.py

@@ -154,7 +154,6 @@ def reject_psbt(self, event_id):
         self.user_prompt_cooldown = now() + USER_PROMPT_COOLDOWN
         self.mark_pending_event_rcvd(event_id)
         self.add_transaction_to_wallet(self.tx, on_failure=self.on_add_fail)
-        self.wallet.save_db()
 
     def on_add_fail(self):
         self.logger.error('failed to add tx to wallet')