Removes incorrect note

Fixes #5254

Author: AArdeev

doc/reference/reference_lua/box_tuple/info.rst

@@ -18,12 +18,6 @@ tuple_object.info()
         -   ``field_map_size`` -- size of the field map.
             Field map is used to speed up access to indexed fields of the tuple.
         -   ``waste_size`` -- amount of excess memory wasted due to internal fragmentation in the `slab allocator <https://github.com/tarantool/small>`_.
-
-            .. note::
-
-                `waste_size` is provided for reference only and can be inaccurate.
-                Avoid using it for memory usage calculations.
-
         -   ``arena`` - type of the arena where the tuple is allocated.
             Possible values are: ``memtx``, ``malloc``, ``runtime``.