Consolidate more language between the backport and the canonical usage docs.

Author: jaraco

docs/index.rst

@@ -1,14 +1,6 @@
 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`
-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 :mod:`importlib.metadata`,
 enabling early access to features of future Python versions and making
 functionality available for older Python versions. Users are encouraged to
@@ -43,7 +35,3 @@ Indices and tables
 * :ref:`genindex`
 * :ref:`modindex`
 * :ref:`search`
-
-
-.. _`entry point API`: https://setuptools.readthedocs.io/en/latest/pkg_resources.html#entry-points
-.. _`metadata API`: https://setuptools.readthedocs.io/en/latest/pkg_resources.html#metadata-api

docs/using.rst

@@ -4,14 +4,13 @@
  Using :mod:`!importlib_metadata`
 =================================
 
-``importlib_metadata`` is a library that provides for access to installed
-package metadata.  Built in part on Python's import system, this library
+``importlib_metadata`` is a library that provides access to installed
+package metadata, such as its entry points or its
+top-level name.  Built in part on Python's import system, this library
 intends to replace similar functionality in the `entry point
 API`_ and `metadata API`_ of ``pkg_resources``.  Along with
-:mod:`importlib.resources` (with new features backported to
-:doc:`importlib_resources <importlib_resources:index>`),
-this package can eliminate the need to use the older
-and less efficient
+:mod:`importlib.resources`,
+this package can eliminate the need to use the older and less efficient
 ``pkg_resources`` package.
 
 By "installed package" we generally mean a third-party package installed into