Improve Python code: address unused variables (#11049)

* Address F841 (unused variable).

* Reformat.

* Add changelog fragment.

* More cleanup.

* Remove trailing whitespace.

* Readd removed code as a comment with TODO.

plugins/inventory/online.py

@@ -135,7 +135,7 @@ class InventoryModule(BaseInventoryPlugin):
     def _fetch_information(self, url):
         try:
             response = open_url(url, headers=self.headers)
-        except Exception as e:
+        except Exception:
             self.display.warning(f"An error happened while fetching: {url}")
             return None