Fix lint failure in a test/asgitestutil.py

Author: LetzNico

tests/util/src/opentelemetry/test/asgitestutil.py

@@ -15,7 +15,6 @@
 import asyncio
 
 from asgiref.testing import ApplicationCommunicator
-
 from opentelemetry.test.spantestutil import SpanTestBase