multiple modules: removed unused imports (#5240) (#5257)

* multiple modules: removed unused imports

* fixed ali_instance(_info) import check

* add changelog fragment

* Update changelogs/fragments/5240-unused-imports.yaml

Co-authored-by: Felix Fontein <felix@fontein.de>

Co-authored-by: Felix Fontein <felix@fontein.de>
(cherry picked from commit 775be1d3f3)

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

plugins/module_utils/alicloud_ecs.py

@@ -15,6 +15,7 @@ __metaclass__ = type
 
 import os
 import json
+import traceback
 from ansible.module_utils.basic import env_fallback
 
 try:
@@ -28,8 +29,11 @@ try:
     import footmark.dns
     import footmark.ram
     import footmark.market
+
+    FOOTMARK_IMP_ERR = None
     HAS_FOOTMARK = True
 except ImportError:
+    FOOTMARK_IMP_ERR = traceback.format_exc()
     HAS_FOOTMARK = False