Setting cookie from cookie does not need to be sanitized

[kkmuffme]

e.g. when resetting/increasing lifetime of a cookie

setcookie( $cookie, $_COOKIE[ $cookie ], time() + 86400, '/' )
setcookie( 'hello', $_COOKIE[ $cookie ], time() + 86400, '/' )

currently gives an error for WordPress.Security.ValidatedSanitizedInput

EDIT: use case: safari ITP HTTP cookie handling for JS cookies.