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
 

plugins/inventory/xen_orchestra.py

@@ -112,7 +112,7 @@ try:
 
     if LooseVersion(websocket.__version__) <= LooseVersion("1.0.0"):
         raise ImportError
-except ImportError as e:
+except ImportError:
     HAS_WEBSOCKET = False