chore: Remove the RSA security advisory from our deny config

Since we don't depend on mas anymore, we don't depend on RSA either.

Let's remove the exception, lest we reintroduce the dependency and
security issue.

Author: poljar

.deny.toml

@@ -9,7 +9,6 @@ exclude = [
 [advisories]
 version = 2
 ignore = [
-    { id = "RUSTSEC-2023-0071", reason = "We are not using RSA directly, nor do we depend on the RSA crate directly" },
     { id = "RUSTSEC-2024-0436", reason = "Unmaintained paste crate, not critical." },
     { id = "RUSTSEC-2024-0384", reason = "Unmaintained backoff crate, not critical. We'll migrate soon." },
     { id = "RUSTSEC-2025-0012", reason = "Unmaintained backoff crate, not critical. We'll migrate soon." },