Prepare main for 13.0.0 (#11834)

* Bump version to 13.0.0.

* Remove deprecated modules and plugins.

* Remove deprecated module utils.

* Remove leftovers.

* Remove mode=compatibility.

* Change default of is_pre740 from true to false.

* Change default of force_defaults from true to false.

* Remove support for ubuntu_legacy mechanism.

* Remove cpanm compatibility tests.

plugins/modules/rocketchat.py

@@ -101,9 +101,10 @@ options:
     description:
       - If V(true), the payload matches Rocket.Chat prior to 7.4.0 format. This format has been used by the module since its
         inception, but is no longer supported by Rocket.Chat 7.4.0.
-      - The default value of the option, V(true), is B(deprecated) since community.general 11.2.0 and will change to V(false) in community.general 13.0.0.
+      - The default value changed from V(true) to V(false) in community.general 13.0.0.
       - This parameter is going to be removed in a future release when Rocket.Chat 7.4.0 becomes the minimum supported version.
     type: bool
+    default: false
     version_added: 10.5.0
 """
 
@@ -229,7 +230,7 @@ def main():
             validate_certs=dict(default=True, type="bool"),
             color=dict(type="str", default="normal", choices=["normal", "good", "warning", "danger"]),
             attachments=dict(type="list", elements="dict"),
-            is_pre740=dict(type="bool"),
+            is_pre740=dict(type="bool", default=False),
         )
     )
 
@@ -246,15 +247,6 @@ def main():
     attachments = module.params["attachments"]
     is_pre740 = module.params["is_pre740"]
 
-    if is_pre740 is None:
-        module.deprecate(
-            "The default value 'true' for 'is_pre740' is deprecated and will change to 'false' in community.general 13.0.0."
-            " You can explicitly set 'is_pre740' in your task to avoid this deprecation warning",
-            version="13.0.0",
-            collection_name="community.general",
-        )
-        is_pre740 = True
-
     payload = build_payload_for_rocketchat(
         module, text, channel, username, icon_url, icon_emoji, link_names, color, attachments, is_pre740
     )