Unused variables in Rest module

$supported_formats were fixed in 📌 Unused variable $supported_formats in ResourceRoutes.php, rest module Fixed ,
$parseable_valid_request_body_2 was fixed in #3173076: Unused variable $parseable_valid_request_body_2 in EntityResourceTestBase.php, rest module →

$edit in core/modules/rest/tests/src/Functional/Views/StyleSerializerTest.php is in use. It could be rewritten but would not be a good use of contributor or cormitter time.

I will close as a duplicate of 📌 Unused variable $supported_formats in ResourceRoutes.php, rest module Fixed and add credit over there.