Run again w/o slice shift

Author: DinoV

Include/internal/pycore_mimalloc.h

@@ -45,11 +45,6 @@ struct mi_heap_qsbr_s {
 #  define MI_NO_THP 1
 // Do not use guarded allocations. The free-threaded GC does not support their block layout.
 #  define MI_GUARDED 0
-// Use 16 KiB pages instead of the default 64 KiB in 64-bit platforms.
-// TODO: 32-bit platforms may need tuning too.
-#  if SIZEOF_VOID_P == 8
-#    define MI_ARENA_SLICE_SHIFT 14
-#  endif
 #ifdef Py_DEBUG
 #  define MI_DEBUG 2
 #else