Fix wording in Functional Programming HOWTO (GH-98939)

diff --git a/Doc/howto/functional.rst b/Doc/howto/functional.rst
index 7d30c34..38a651b 100644
--- a/Doc/howto/functional.rst
+++ b/Doc/howto/functional.rst
@@ -994,7 +994,7 @@
 The functools module
 ====================
 
-The :mod:`functools` module in Python 2.5 contains some higher-order functions.
+The :mod:`functools` module contains some higher-order functions.
 A **higher-order function** takes one or more functions as input and returns a
 new function.  The most useful tool in this module is the
 :func:`functools.partial` function.