feat: switch to aws-lc-rs cryptography provider (#178)

Switches crypto provider to keep
chatmail codebase consistent,
analogous to https://github.com/chatmail/core/pull/8313

Signed-off-by: Jagoda Ślązak <jslazak@jslazak.com>

filtermail/src/utils.rs

@@ -1,4 +1,3 @@
-use hickory_resolver::config::ResolverOpts;
 use hickory_resolver::{TokioResolver, proto::dnssec::TrustAnchors};
 use mailparse::MailAddr;
 use std::path::PathBuf;