Potential fix for code scanning alert no. 662: Unused variable, import, function or class

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: sjd210

src/app/components/elements/svg/DifficultyIcons.tsx

@@ -6,7 +6,6 @@ import classnames from "classnames";
 import {Rectangle} from "./Rectangle";
 import {Circle} from "./Circle";
 import classNames from "classnames";
-import { icon } from "leaflet";
 
 // Difficulty icon proportions
 const difficultyIconWidth = siteSpecific(15, 25);