Revert "Switch to asyncio.eager_task_factory for Python 3.12"

This reverts commit a070bfe.

src/kiwipy/rmq/tasks.py

@@ -2,7 +2,6 @@
 import asyncio
 import collections
 from contextlib import asynccontextmanager
-from functools import partial
 import logging
 from typing import Generator, Optional
 import uuid
@@ -21,12 +20,6 @@
 
 TaskInfo = collections.namedtuple('TaskBody', ('task', 'no_reply'))
 
-try:
-    run_coroutine = asyncio.eager_task_factory
-except AttributeError:
-    # For Python older than 3.12
-    run_coroutine = asyncio.run_coroutine_threadsafe
-
 
 class RmqTaskSubscriber(messages.BaseConnectionWithExchange):
     """
@@ -318,7 +311,7 @@ def _outcome_destroyed(self, outcome_ref):
         assert outcome_ref is self._outcome_ref
         # This task will not be processed
         self._outcome_ref = None
-        partial(run_coroutine, loop=self._loop)(coro=self.requeue())
+        asyncio.run_coroutine_threadsafe(self.requeue(), loop=self._loop)
 
     def _finalise(self):
         self._outcome_ref = None