Improve interlinking of archiving/compression modules docs.

- Remove duplicated 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/archiving.rst b/Doc/library/archiving.rst
index f2d08ad..75d137c 100644
--- a/Doc/library/archiving.rst
+++ b/Doc/library/archiving.rst
@@ -6,6 +6,7 @@
 
 The modules described in this chapter support data compression with the zlib,
 gzip, and bzip2 algorithms, and  the creation of ZIP- and tar-format archives.
+See also :ref:`archiving-operations` provided by the :mod:`shutil` module.
 
 
 .. toctree::