Fix linter errors.

atxm/machine.py

@@ -222,9 +222,7 @@ def __handle_active_transaction(self) -> bool:
 
         # Outcome 1: the pending transaction is paused by strategies
         if self.__pause:
-            self.log.warn(
-                f"[pause] transaction #{pending_tx.id} paused by strategies"
-            )
+            self.log.warn(f"[pause] transaction #{pending_tx.id} paused by strategies")
             return False
 
         try:
@@ -378,9 +376,7 @@ def __get_receipt(self, pending_tx: PendingTx) -> Optional[TxReceipt]:
             txdata = self.w3.eth.get_transaction(pending_tx.txhash)
             pending_tx.data = txdata
         except TransactionNotFound:
-            self.log.error(
-                f"[error] Transaction {pending_tx.txhash.hex()} not found"
-            )
+            self.log.error(f"[error] Transaction {pending_tx.txhash.hex()} not found")
             return
 
         receipt = _get_receipt(w3=self.w3, txhash=txdata['hash'])

atxm/utils.py

@@ -1,11 +1,11 @@
 import contextlib
-from typing import Callable, Optional, Union
+from typing import Callable, Optional
 
 from cytoolz import memoize
 from twisted.internet import reactor
 from web3 import Web3
 from web3.exceptions import TransactionNotFound
-from web3.types import PendingTx as PendingTxData, TxData, TxParams
+from web3.types import TxData, TxParams
 from web3.types import RPCError, TxReceipt, Wei
 
 from atxm.exceptions import (