[TOOLS] Continue raising PHPStan level to 6

plugins/Cover/Controller/Cover.php

@@ -58,7 +58,7 @@ class Cover
      * @throws ClientException Invalid form
      * @throws ServerException Invalid file type
      *
-     * @return array template
+     * @return ControllerResultType
      */
     public static function coverSettings(Request $request): array
     {
@@ -113,7 +113,7 @@ class Cover
             // Only delete files if the commit went through
             if ($old_file != null) {
                 foreach ($old_file as $f) {
-                    @unlink($f);
+                    @unlink($f->getPath());
                 }
             }
             throw new RedirectException();
@@ -131,7 +131,7 @@ class Cover
                 DB::remove($cover);
                 DB::flush();
                 foreach ($old_file as $f) {
-                    @unlink($f);
+                    @unlink($f->getPath());
                 }
                 throw new RedirectException();
             }