Improve interlinking of archiving/compression modules docs.

- Remove duplicate list of links to the other modules from each
  module’s doc (people can already go up to library/archiving and
  there they can see the list).

- Link to shutil high-level operations.

Reviewed by Nadeem Vawda in #6715.
diff --git a/Doc/library/tarfile.rst b/Doc/library/tarfile.rst
index 5502adc..b6124e1 100644
--- a/Doc/library/tarfile.rst
+++ b/Doc/library/tarfile.rst
@@ -16,7 +16,8 @@
 
 The :mod:`tarfile` module makes it possible to read and write tar
 archives, including those using gzip or bz2 compression.
-(:file:`.zip` files can be read and written using the :mod:`zipfile` module.)
+Use the :mod:`zipfile` module to read or write :file:`.zip` files, or the
+higher-level functions in :ref:`shutil <archiving-operations>`.
 
 Some facts and figures: