chore: address hero preload review feedback

Agent-Logs-Url: https://github.com/helsingborg-stad/Municipio/sessions/70926f45-b1e3-40d9-9bc1-d22f39313fd8

Co-authored-by: sebastianthulin <797129+sebastianthulin@users.noreply.github.com>

Author: Copilot

library/Head/HeroImageContractResolver.php

@@ -21,7 +21,6 @@ public function __construct(
         private AcfService $acfService,
         private ?ImageResolverInterface $imageResolver = null,
     ) {
-        $this->imageResolver ??= null;
     }
 
     /**