Revert "pythongh-115103: Update refleak checker to trigger _PyMem_Pro…

…cessDelayed (pythongh-116238)"

This reverts commit 2e91578.

Python/gc_free_threading.c

@@ -324,23 +324,6 @@ merge_all_queued_objects(PyInterpreterState *interp, struct collection_state *st
     HEAD_UNLOCK(&_PyRuntime);
 }
 
-static void
-process_delayed_frees(PyInterpreterState *interp)
-{
-    // In STW status, we can observe the latest write sequence by
-    // advancing the write sequence immediately.
-    _Py_qsbr_advance(&interp->qsbr);
-    _PyThreadStateImpl *current_tstate = (_PyThreadStateImpl *)_PyThreadState_GET();
-    _Py_qsbr_quiescent_state(current_tstate->qsbr);
-    HEAD_LOCK(&_PyRuntime);
-    PyThreadState *tstate = interp->threads.head;
-    while (tstate != NULL) {
-        _PyMem_ProcessDelayed(tstate);
-        tstate = (PyThreadState *)tstate->next;
-    }
-    HEAD_UNLOCK(&_PyRuntime);
-}
-
 // Subtract an incoming reference from the computed "gc_refs" refcount.
 static int
 visit_decref(PyObject *op, void *arg)
@@ -1023,7 +1006,6 @@ gc_collect_internal(PyInterpreterState *interp, struct collection_state *state)
     _PyEval_StopTheWorld(interp);
     // merge refcounts for all queued objects
     merge_all_queued_objects(interp, state);
-    process_delayed_frees(interp);
 
     // Find unreachable objects
     int err = deduce_unreachable_heap(interp, state);