lib/connections: Revert add more methods to the quic conn wrapper (#7651)

This reverts commit faf15b4567a37ab543ae660f8729355c8e872e68.

lib/connections/quic_listen.go

@@ -219,26 +219,17 @@ func (quicListenerFactory) Enabled(cfg config.Configuration) bool {
 	return true
 }
 
-// stunConnQUICWrapper provides methods used by quic.
-// https://pkg.go.dev/github.com/lucas-clemente/quic-go#OOBCapablePacketConn
-// https://github.com/lucas-clemente/quic-go/blob/master/packet_handler_map.go#L85
 type stunConnQUICWrapper struct {
 	net.PacketConn
 	underlying *net.UDPConn
 }
 
+// SetReadBuffer is required by QUIC < v0.20.0
 func (s *stunConnQUICWrapper) SetReadBuffer(size int) error {
 	return s.underlying.SetReadBuffer(size)
 }
 
+// SyscallConn is required by QUIC
 func (s *stunConnQUICWrapper) SyscallConn() (syscall.RawConn, error) {
 	return s.underlying.SyscallConn()
 }
-
-func (s *stunConnQUICWrapper) ReadMsgUDP(b, oob []byte) (n, oobn, flags int, addr *net.UDPAddr, err error) {
-	return s.underlying.ReadMsgUDP(b, oob)
-}
-
-func (s *stunConnQUICWrapper) WriteMsgUDP(b, oob []byte, addr *net.UDPAddr) (n, oobn int, err error) {
-	return s.underlying.WriteMsgUDP(b, oob, addr)
-}