Remove compatibility code for asynccontextmanager

Author: akx

tests/test_asyncio/conftest.py

@@ -1,6 +1,5 @@
 import os
 import random
-from contextlib import asynccontextmanager as _asynccontextmanager
 from datetime import datetime, timezone
 from enum import Enum
 from typing import Union
@@ -403,32 +402,6 @@ async def wait_for_command(
             return None
 
 
-# python 3.6 doesn't have the asynccontextmanager decorator.  Provide it here.
-class AsyncContextManager:
-    def __init__(self, async_generator):
-        self.gen = async_generator
-
-    async def __aenter__(self):
-        try:
-            return await self.gen.__anext__()
-        except StopAsyncIteration as err:
-            raise RuntimeError("Pickles") from err
-
-    async def __aexit__(self, exc_type, exc_inst, tb):
-        if exc_type:
-            await self.gen.athrow(exc_type, exc_inst, tb)
-            return True
-        try:
-            await self.gen.__anext__()
-        except StopAsyncIteration:
-            return
-        raise RuntimeError("More pickles")
-
-
-def asynccontextmanager(func):
-    return _asynccontextmanager(func)
-
-
 # helpers to get the connection arguments for this run
 @pytest.fixture()
 def redis_url(request):

tests/test_asyncio/test_connection_pool.py

@@ -1,5 +1,6 @@
 import asyncio
 import re
+from contextlib import asynccontextmanager
 
 import pytest
 import pytest_asyncio
@@ -9,7 +10,6 @@
 from tests.conftest import skip_if_redis_enterprise, skip_if_server_version_lt
 
 from .compat import aclosing, mock
-from .conftest import asynccontextmanager
 from .test_pubsub import wait_for_message