Codestyle changes

Author: vladvildanov

tests/test_multidb/test_client.py

@@ -5,17 +5,14 @@
 import pybreaker
 import pytest
 
-from redis.backoff import NoBackoff
 from redis.event import EventDispatcher, OnCommandsFailEvent
-from redis.exceptions import ConnectionError
 from redis.multidb.circuit import State as CBState, PBCircuitBreakerAdapter
 from redis.multidb.database import SyncDatabase
 from redis.multidb.client import MultiDBClient
 from redis.multidb.exception import NoValidDatabaseException
 from redis.multidb.failover import WeightBasedFailoverStrategy
 from redis.multidb.failure_detector import FailureDetector
 from redis.multidb.healthcheck import HealthCheck, EchoHealthCheck
-from redis.retry import Retry
 from tests.test_multidb.conftest import create_weighted_list