Removed 'default=None' in a batch of modules 2 (#4567) (#4569)

* removed default=None

* added changelog fragment

(cherry picked from commit 3b103f905e)

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

plugins/modules/cloud/smartos/smartos_image_info.py

@@ -95,7 +95,7 @@ class ImageFacts(object):
 def main():
     module = AnsibleModule(
         argument_spec=dict(
-            filters=dict(default=None),
+            filters=dict(),
         ),
         supports_check_mode=True,
     )