Remove more references to specific Python versions.

Author: jaraco

docs/index.rst

@@ -4,9 +4,9 @@ Welcome to |project| documentation!
 ``importlib_metadata`` is a library which provides an API for accessing an
 installed package's metadata (see :pep:`566`), such as its entry points or its top-level
 name.  This functionality intends to replace most uses of ``pkg_resources``
-`entry point API`_ and `metadata API`_.  Along with :mod:`importlib.resources` in
-Python 3.7 and newer (backported as :doc:`importlib_resources <importlib_resources:index>` for older
-versions of Python), this can eliminate the need to use the older and less
+`entry point API`_ and `metadata API`_.  Along with :mod:`importlib.resources`
+and newer (backported as :doc:`importlib_resources <importlib_resources:index>`),
+this package can eliminate the need to use the older and less
 efficient ``pkg_resources`` package.
 
 ``importlib_metadata`` supplies a backport of