Update ts-eslint (#23723)

* Update ts-eslint

* Remove comments

* Remove unused ts-ignore

* Add undefined generic type instead of unknown

* Remove unused undefined type

* Fix type issues

* Use undefined instead of void for subscribed return type

src/components/ha-icon-picker.ts

@@ -60,7 +60,7 @@ const loadCustomIconItems = async (iconsetPrefix: string) => {
       keywords: icon.keywords ?? [],
     }));
     return customIconItems;
-  } catch (e) {
+  } catch (_err) {
     // eslint-disable-next-line no-console
     console.warn(`Unable to load icon list for ${iconsetPrefix} iconset`);
     return [];