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/zlib.rst b/Doc/library/zlib.rst
index a7b8343..897d919 100644
--- a/Doc/library/zlib.rst
+++ b/Doc/library/zlib.rst
@@ -18,9 +18,7 @@
 consult the zlib manual at http://www.zlib.net/manual.html for authoritative
 information.
 
-For reading and writing ``.gz`` files see the :mod:`gzip` module. For
-other archive formats, see the :mod:`bz2`, :mod:`zipfile`, and
-:mod:`tarfile` modules.
+For reading and writing ``.gz`` files see the :mod:`gzip` module.
 
 The available exception and functions in this module are: