several fixes:

- removed actions feature as this should be global and not per module
- removed default fields from return docs
- moved tags docs to shared fragments
- removed unused imports

lib/ansible/modules/cloud/azure/azure_rm_virtualnetwork.py

@@ -77,21 +77,10 @@ options:
             - absent
             - present
         required: false
-    tags:
-        description:
-            - "Dictionary of string:string pairs to assign as metadata to the object. Metadata tags on the object
-              will be updated with any provided values. To remove tags use the purge_tags option."
-        default: null
-        required: false
-    purge_tags:
-        description:
-            - Use to remove tags from an object. Any tags not found in the tags parameter will be removed from
-              the object's metadata.
-        default: false
-        required: false
 
 extends_documentation_fragment:
     - azure
+    - azure_tags
 
 author:
     - "Chris Houseknecht (@chouseknecht)"
@@ -150,7 +139,6 @@ from ansible.module_utils.azure_rm_common import *
 
 try:
     from msrestazure.azure_exceptions import CloudError
-    from azure.common import AzureMissingResourceHttpError
     from azure.mgmt.network.models import VirtualNetwork, AddressSpace, DhcpOptions
 except ImportError:
     # This is handled in azure_rm_common