gh-125472: Revert "gh-124958: fix asyncio.TaskGroup and _PyFuture refcycles (#12… (#125476)

Revert "gh-124958: fix asyncio.TaskGroup and _PyFuture refcycles (#124959)"

This reverts commit d5dbbf4372cd3dbf3eead1cc70ddc4261c061fd9.

2 files changed, 2 insertions, 112 deletions

diff --git a/Lib/test/test_asyncio/test_futures.py b/Lib/test/test_asyncio/test_futures.py
index c566b28..458b704 100644
--- a/Lib/test/test_asyncio/test_futures.py
+++ b/Lib/test/test_asyncio/test_futures.py
@@ -659,28 +659,6 @@ class BaseFutureTests:
             fut = self._new_future(loop=self.loop)
             fut.set_result(Evil())
 
-    def test_future_cancelled_result_refcycles(self):
-        f = self._new_future(loop=self.loop)
-        f.cancel()
-        exc = None
-        try:
-            f.result()
-        except asyncio.CancelledError as e:
-            exc = e
-        self.assertIsNotNone(exc)
-        self.assertListEqual(gc.get_referrers(exc), [])
-
-    def test_future_cancelled_exception_refcycles(self):
-        f = self._new_future(loop=self.loop)
-        f.cancel()
-        exc = None
-        try:
-            f.exception()
-        except asyncio.CancelledError as e:
-            exc = e
-        self.assertIsNotNone(exc)
-        self.assertListEqual(gc.get_referrers(exc), [])
-
 
 @unittest.skipUnless(hasattr(futures, '_CFuture'),
                      'requires the C _asyncio module')
diff --git a/Lib/test/test_asyncio/test_taskgroups.py b/Lib/test/test_asyncio/test_taskgroups.py
index 138f59e..4852536 100644
--- a/Lib/test/test_asyncio/test_taskgroups.py
+++ b/Lib/test/test_asyncio/test_taskgroups.py
@@ -1,7 +1,7 @@
 # Adapted with permission from the EdgeDB project;
 # license: PSFL.
 
-import gc
+
 import asyncio
 import contextvars
 import contextlib
@@ -11,6 +11,7 @@ import warnings
 
 from test.test_asyncio.utils import await_without_task
 
+
 # To prevent a warning "test altered the execution environment"
 def tearDownModule():
     asyncio.set_event_loop_policy(None)
@@ -898,95 +899,6 @@ class TestTaskGroup(unittest.IsolatedAsyncioTestCase):
 
         await outer()
 
-    async def test_exception_refcycles_direct(self):
-        """Test that TaskGroup doesn't keep a reference to the raised ExceptionGroup"""
-        tg = asyncio.TaskGroup()
-        exc = None
-
-        class _Done(Exception):
-            pass
-
-        try:
-            async with tg:
-                raise _Done
-        except ExceptionGroup as e:
-            exc = e
-
-        self.assertIsNotNone(exc)
-        self.assertListEqual(gc.get_referrers(exc), [])
-
-
-    async def test_exception_refcycles_errors(self):
-        """Test that TaskGroup deletes self._errors, and __aexit__ args"""
-        tg = asyncio.TaskGroup()
-        exc = None
-
-        class _Done(Exception):
-            pass
-
-        try:
-            async with tg:
-                raise _Done
-        except* _Done as excs:
-            exc = excs.exceptions[0]
-
-        self.assertIsInstance(exc, _Done)
-        self.assertListEqual(gc.get_referrers(exc), [])
-
-
-    async def test_exception_refcycles_parent_task(self):
-        """Test that TaskGroup deletes self._parent_task"""
-        tg = asyncio.TaskGroup()
-        exc = None
-
-        class _Done(Exception):
-            pass
-
-        async def coro_fn():
-            async with tg:
-                raise _Done
-
-        try:
-            async with asyncio.TaskGroup() as tg2:
-                tg2.create_task(coro_fn())
-        except* _Done as excs:
-            exc = excs.exceptions[0].exceptions[0]
-
-        self.assertIsInstance(exc, _Done)
-        self.assertListEqual(gc.get_referrers(exc), [])
-
-    async def test_exception_refcycles_propagate_cancellation_error(self):
-        """Test that TaskGroup deletes propagate_cancellation_error"""
-        tg = asyncio.TaskGroup()
-        exc = None
-
-        try:
-            async with asyncio.timeout(-1):
-                async with tg:
-                    await asyncio.sleep(0)
-        except TimeoutError as e:
-            exc = e.__cause__
-
-        self.assertIsInstance(exc, asyncio.CancelledError)
-        self.assertListEqual(gc.get_referrers(exc), [])
-
-    async def test_exception_refcycles_base_error(self):
-        """Test that TaskGroup deletes self._base_error"""
-        class MyKeyboardInterrupt(KeyboardInterrupt):
-            pass
-
-        tg = asyncio.TaskGroup()
-        exc = None
-
-        try:
-            async with tg:
-                raise MyKeyboardInterrupt
-        except MyKeyboardInterrupt as e:
-            exc = e
-
-        self.assertIsNotNone(exc)
-        self.assertListEqual(gc.get_referrers(exc), [])
-
 
 if __name__ == "__main__":
     unittest.main()