Revert "fix(s2n-quic-transport): Unmap peer address when determining …

…MTU probe size (#1321)"

This reverts commit 88aa6a2.

quic/s2n-quic-transport/src/path/mtu.rs

@@ -125,7 +125,7 @@ impl Controller {
     /// The UDP header length and IP header length will be subtracted from `max_mtu` to
     /// determine the max_udp_payload used for limiting the payload length of probe packets.
     pub fn new(max_mtu: MaxMtu, peer_socket_address: &SocketAddress) -> Self {
-        let min_ip_header_len = match peer_socket_address.unmap() {
+        let min_ip_header_len = match peer_socket_address {
             SocketAddress::IpV4(_) => IPV4_MIN_HEADER_LEN,
             SocketAddress::IpV6(_) => IPV6_MIN_HEADER_LEN,
         };
@@ -524,26 +524,6 @@ mod test {
         );
     }
 
-    #[test]
-    fn new_ipv6_mapped() {
-        let addr: SocketAddr = "127.0.0.1:443".parse().unwrap();
-        let addr: SocketAddress = addr.into();
-        let controller = Controller::new(1600.try_into().unwrap(), &addr.to_ipv6_mapped().into());
-
-        assert_eq!(
-            1600 - UDP_HEADER_LEN - IPV4_MIN_HEADER_LEN,
-            controller.max_udp_payload
-        );
-        assert_eq!(
-            1600 - UDP_HEADER_LEN - IPV4_MIN_HEADER_LEN,
-            controller.max_probe_size
-        );
-        assert_eq!(
-            ETHERNET_MTU - UDP_HEADER_LEN - IPV4_MIN_HEADER_LEN,
-            controller.probed_size
-        );
-    }
-
     #[test]
     fn enable_already_enabled() {
         let mut controller = new_controller(1500);