Fix linter complaints

Author: OlegZv

instrumentation/opentelemetry-instrumentation-redis/src/opentelemetry/instrumentation/redis/__init__.py

@@ -775,7 +775,6 @@ def uninstrument_client(
             # created instance. any pipelines created before un-instrumenting will
             # remain instrumented (pipelines should usually have a short span)
             unwrap(client, "pipeline")
-            pass
         else:
             _logger.warning(
                 "Attempting to un-instrument Redis connection that wasn't instrumented"

instrumentation/opentelemetry-instrumentation-redis/tests/test_redis.py

@@ -408,9 +408,10 @@ def assert_span_count(self, count: int):
     def setUp(self):
         super().setUp()
         self.instrumentor = RedisInstrumentor()
-        self.client = FakeRedis()
+        self.client: FakeRedis = FakeRedis()
 
-    async def _redis_pipeline_operations(self, client):
+    @staticmethod
+    async def _redis_pipeline_operations(client: FakeRedis):
         with pytest.raises(WatchError):
             async with client.pipeline(transaction=False) as pipe:
                 await pipe.watch("a")