wallet, rpc:remove settxfee and paytxfee

test/functional/interface_bitcoin_cli.py

@@ -249,7 +249,6 @@ class TestBitcoinCli(BitcoinTestFramework):
             wallet_info = self.nodes[0].getwalletinfo()
             assert_equal(int(cli_get_info['Keypool size']), wallet_info['keypoolsize'])
             assert_equal(int(cli_get_info['Unlocked until']), wallet_info['unlocked_until'])
-            assert_equal(Decimal(cli_get_info['Transaction fee rate (-paytxfee) (BTC/kvB)']), wallet_info['paytxfee'])
             assert_equal(Decimal(cli_get_info['Min tx relay fee rate (BTC/kvB)']), network_info['relayfee'])
             assert_equal(self.nodes[0].cli.getwalletinfo(), wallet_info)