Add whatsnew entry for 3.15

Author: sobolevn

Doc/whatsnew/3.15.rst

@@ -706,6 +706,9 @@ typing
   :func:`issubclass`, but warnings were not previously emitted if it was merely
   imported or accessed from the :mod:`!typing` module.
 
+* Deprecated :func:`!typing.no_type_check_decorator` has been removed.
+  (Contributed by Nikita Sobolev in :gh:`133601`.)
+
 
 unicodedata
 -----------