Remove _PyMem_SetDefaultAllocator

Author: colesbury

Include/internal/pycore_pymem.h

@@ -55,13 +55,6 @@ struct _Py_mem_interp_free_queue {
     struct llist_node head;  // queue of _mem_work_chunk items
 };
 
-/* Set the memory allocator of the specified domain to the default.
-   Save the old allocator into *old_alloc if it's non-NULL.
-   Return on success, or return -1 if the domain is unknown. */
-extern int _PyMem_SetDefaultAllocator(
-    PyMemAllocatorDomain domain,
-    PyMemAllocatorEx *old_alloc);
-
 /* Special bytes broadcast into debug memory blocks at appropriate times.
    Strings of these are unlikely to be valid addresses, floats, ints or
    7-bit ASCII.

Objects/obmalloc.c

@@ -554,17 +554,6 @@ static const int pydebug = 1;
 static const int pydebug = 0;
 #endif
 
-int
-_PyMem_SetDefaultAllocator(PyMemAllocatorDomain domain,
-                           PyMemAllocatorEx *old_alloc)
-{
-    PyMutex_Lock(&ALLOCATORS_MUTEX);
-    int res = set_default_allocator_unlocked(domain, pydebug, old_alloc);
-    PyMutex_Unlock(&ALLOCATORS_MUTEX);
-    return res;
-}
-
-
 int
 _PyMem_GetAllocatorName(const char *name, PyMemAllocatorName *allocator)
 {