Remove deprecated default.plugin_filters_cfg config option (#77429)

* Remove deprecated default.plugin_filters_cfg config option

Fixes #77398

* Fix tests

changelogs/fragments/77398-remove-plugin_filters_cfg-default.yml

@@ -0,0 +1,2 @@
+removed_features:
+  - Remove deprecated ``plugin_filters_cfg`` config option from ``default`` section (https://github.com/ansible/ansible/issues/77398)

lib/ansible/config/base.yml

@@ -1815,12 +1815,6 @@ PLUGIN_FILTERS_CFG:
     - "See :ref:`plugin_filtering_config` for details of the filter file's format."
     - " The default is /etc/ansible/plugin_filters.yml"
   ini:
-  - key: plugin_filters_cfg
-    section: default
-    deprecated:
-      why: specifying "plugin_filters_cfg" under the "default" section is deprecated
-      version: "2.12"
-      alternatives: the "defaults" section instead
   - key: plugin_filters_cfg
     section: defaults
   type: path

test/integration/targets/plugin_filtering/filter_lookup.ini

@@ -1,4 +1,4 @@
-[default]
+[defaults]
 retry_files_enabled = False
 plugin_filters_cfg = ./filter_lookup.yml
 

test/integration/targets/plugin_filtering/filter_modules.ini

@@ -1,4 +1,4 @@
-[default]
+[defaults]
 retry_files_enabled = False
 plugin_filters_cfg = ./filter_modules.yml
 

test/integration/targets/plugin_filtering/filter_ping.ini

@@ -1,4 +1,4 @@
-[default]
+[defaults]
 retry_files_enabled = False
 plugin_filters_cfg = ./filter_ping.yml
 

test/integration/targets/plugin_filtering/filter_stat.ini

@@ -1,4 +1,4 @@
-[default]
+[defaults]
 retry_files_enabled = False
 plugin_filters_cfg = ./filter_stat.yml
 

test/integration/targets/plugin_filtering/no_filters.ini

@@ -1,4 +1,4 @@
-[default]
+[defaults]
 retry_files_enabled = False
 plugin_filters_cfg = ./empty.yml