fix build failure

Author: kbalt

media/rtc/src/rtp_transport/dtls_srtp.rs

@@ -2,7 +2,6 @@ use dimpl::Dtls;
 use sha2::{Digest, Sha256};
 use srtp::{DtlsSrtpPolicies, SrtpSession};
 use std::{
-    cmp,
     collections::VecDeque,
     sync::Arc,
     time::{Duration, Instant},

media/rtc/src/sdp/mod.rs

@@ -9,7 +9,6 @@ use super::{
     opt_min,
     rtp_transport::{Connectivity, RtpTransport, RtpTransportEvent, RtpTransportPorts},
 };
-use crate::rtp::RtpPacket;
 use crate::{
     rtp::RtpPacket,
     rtp_session::{