[9.0.0] Remove deprecated modules and features (#8198)

* Remove deprecated modules.

* Update BOTMETA.

* Update ignore.txt files.

* Bump collection version to 9.0.0.

* Change timeout from 10 to 60.

* Remove the alias autosubscribe of auto_attach.

* Change default of mode from compatibility to new.

* Remove deprecated classes.

* Remove mh.mixins.deps.DependencyMixin.

* Remove flowdock module.

* Remove proxmox_default_behavior option.

* Remove ack_* options.

* Remove deprecated command support.

* Change virtualenv behavior.

* Fix changelog.

* Remove imports of deprecated (and now removed) code.

* Fix tests.

* Fix sanity tests.

* Require Django 4.1.

* Use V() instead of C() for values.

Co-authored-by: Alexei Znamensky <103110+russoz@users.noreply.github.com>

* django_manage: improve docs for release 9.0.0

* markup

* fix doc notes in cpanm

---------

Co-authored-by: Alexei Znamensky <103110+russoz@users.noreply.github.com>
Co-authored-by: Alexei Znamensky <russoz@gmail.com>

plugins/modules/cpanm.py

@@ -68,9 +68,10 @@ options:
   mode:
     description:
       - Controls the module behavior. See notes below for more details.
-      - Default is V(compatibility) but that behavior is deprecated and will be changed to V(new) in community.general 9.0.0.
+      - The default changed from V(compatibility) to V(new) in community.general 9.0.0.
     type: str
     choices: [compatibility, new]
+    default: new
     version_added: 3.0.0
   name_check:
     description:
@@ -80,12 +81,16 @@ options:
 notes:
   - Please note that U(http://search.cpan.org/dist/App-cpanminus/bin/cpanm, cpanm) must be installed on the remote host.
   - "This module now comes with a choice of execution O(mode): V(compatibility) or V(new)."
-  - "O(mode=compatibility): When using V(compatibility) mode, the module will keep backward compatibility. This is the default mode.
+  - >
+    O(mode=compatibility): When using V(compatibility) mode, the module will keep backward compatibility.
+    This was the default mode before community.general 9.0.0.
     O(name) must be either a module name or a distribution file. If the perl module given by O(name) is installed (at the exact O(version)
     when specified), then nothing happens. Otherwise, it will be installed using the C(cpanm) executable. O(name) cannot be an URL, or a git URL.
-    C(cpanm) version specifiers do not work in this mode."
-  - "O(mode=new): When using V(new) mode, the module will behave differently. The O(name) parameter may refer to a module name, a distribution file,
-    a HTTP URL or a git repository URL as described in C(cpanminus) documentation. C(cpanm) version specifiers are recognized."
+    C(cpanm) version specifiers do not work in this mode.
+  - >
+    O(mode=new): When using V(new) mode, the module will behave differently. The O(name) parameter may refer to a module name, a distribution file,
+    a HTTP URL or a git repository URL as described in C(cpanminus) documentation. C(cpanm) version specifiers are recognized.
+    This is the default mode from community.general 9.0.0 onwards.
 author:
   - "Franck Cuny (@fcuny)"
   - "Alexei Znamensky (@russoz)"
@@ -150,7 +155,7 @@ class CPANMinus(ModuleHelper):
             mirror_only=dict(type='bool', default=False),
             installdeps=dict(type='bool', default=False),
             executable=dict(type='path'),
-            mode=dict(type='str', choices=['compatibility', 'new']),
+            mode=dict(type='str', default='new', choices=['compatibility', 'new']),
             name_check=dict(type='str')
         ),
         required_one_of=[('name', 'from_path')],
@@ -168,14 +173,6 @@ class CPANMinus(ModuleHelper):
 
     def __init_module__(self):
         v = self.vars
-        if v.mode is None:
-            self.deprecate(
-                "The default value 'compatibility' for parameter 'mode' is being deprecated "
-                "and it will be replaced by 'new'",
-                version="9.0.0",
-                collection_name="community.general"
-            )
-            v.mode = "compatibility"
         if v.mode == "compatibility":
             if v.name_check:
                 self.do_raise("Parameter name_check can only be used with mode=new")