docs - Remove references to old (unsupported) versions of Ansible

This commit was initially merged in https://github.com/ansible-collections/community.aws
See: ansible-collections@623dee5

plugins/modules/route53.py

@@ -19,8 +19,7 @@
 options:
   state:
     description:
-      - Specifies the state of the resource record. As of Ansible 2.4, the I(command) option has been changed
-        to I(state) as default and the choices C(present) and C(absent) have been added, but I(command) still works as well.
+      - Specifies the state of the resource record.
     required: true
     aliases: [ 'command' ]
     choices: [ 'present', 'absent', 'get', 'create', 'delete' ]