Use contextlib.asynccontextmanager

Drop asyncio_extras dependency

asyncpraw/util/token_manager.py

@@ -12,9 +12,9 @@
 
 """
 from abc import ABC, abstractmethod
+from contextlib import asynccontextmanager
 
 import aiofiles
-from asyncio_extras import async_contextmanager
 
 from . import _deprecate_args
 
@@ -159,7 +159,7 @@ async def close(self):
         """Close the sqlite3 connection."""
         await self._connection.close()
 
-    @async_contextmanager
+    @asynccontextmanager
     async def connection(self):
         """Asynchronously setup and provide the sqlite3 connection."""
         if self._connection is None:

setup.py

@@ -65,7 +65,6 @@
         "aiofiles <1",
         "aiohttp <4",
         "aiosqlite <=0.17.0",
-        "asyncio_extras <=1.3.2",
         "asyncprawcore >=2.1, <3",
         "update_checker >=0.18",
     ],