declare package lists stable (#4298)

Author: memsharded

examples/commands/pkglists.rst

@@ -3,9 +3,6 @@
 Using packages-lists
 ====================
 
-.. include:: ../../common/preview_warning.inc
-
-
 Packages lists are a powerful and convenient Conan feature that allows to automate and concatenate different Conan commands.
 Let's see some common use cases:
 

reference/commands/formatters/graph_info_json_formatter.rst

@@ -13,10 +13,6 @@ This section is aimed to show one example of the JSON format output when using a
 
 The output shows the graph information processed by Conan in each command.
 
-
-.. include:: ../../../common/preview_warning.inc
-
-
 The JSON output generated by :command:`conan graph info --require=zlib/1.2.11 -r=conancenter --format=json > graph.json`
 for instance:
 

reference/commands/list.rst

@@ -23,11 +23,6 @@ Using it you can list:
 * Package IDs and their configurations (``name/version@user/channel#rrev:pkgids``).
 * Package revisions (``name/version@user/channel#rrev:pkgids#prev``).
 
-.. warning::
-
-  The json output of the ``conan list --format=json`` is in **preview**.
-  See :ref:`the Conan stability<stability>` section for more information.
-
 
 Let's see some examples on how to use this pattern: