Remove FLoC Header

Google announced that it is discontinuing FLoC.

lib/Controller.php

@@ -342,7 +342,6 @@ class Controller
         header('Cross-Origin-Resource-Policy: same-origin');
         header('Cross-Origin-Embedder-Policy: require-corp');
         header('Cross-Origin-Opener-Policy: same-origin');
-        header('Permissions-Policy: interest-cohort=()');
         header('Referrer-Policy: no-referrer');
         header('X-Content-Type-Options: nosniff');
         header('X-Frame-Options: deny');