test: Remove MiniWallet mempool_valid option

test/functional/mempool_limit.py

@@ -75,7 +75,7 @@ class MempoolLimitTest(BitcoinTestFramework):
 
         # Deliberately try to create a tx with a fee less than the minimum mempool fee to assert that it does not get added to the mempool
         self.log.info('Create a mempool tx that will not pass mempoolminfee')
-        assert_raises_rpc_error(-26, "mempool min fee not met", miniwallet.send_self_transfer, from_node=node, fee_rate=relayfee, mempool_valid=False)
+        assert_raises_rpc_error(-26, "mempool min fee not met", miniwallet.send_self_transfer, from_node=node, fee_rate=relayfee)
 
 
 if __name__ == '__main__':