server: remove useless code

serverconn.go

@@ -127,15 +127,8 @@ func (sc *ServerConn) run() {
 				return err
 
 			case ss := <-sc.sessionRemove:
-				if _, ok := sc.sessions[ss.secretID]; ok {
 				delete(sc.sessions, ss.secretID)
 
-					select {
-					case ss.connRemove <- sc:
-					case <-ss.ctx.Done():
-					}
-				}
-
 			case <-sc.ctx.Done():
 				return liberrors.ErrServerTerminated{}
 			}

serversession.go

@@ -304,20 +304,13 @@ func (ss *ServerSession) run() {
 				}
 
 			case sc := <-ss.connRemove:
-				if _, ok := ss.conns[sc]; ok {
 				delete(ss.conns, sc)
 
-					select {
-					case sc.sessionRemove <- ss:
-					case <-sc.ctx.Done():
-					}
-				}
-
 				// if session is not in state RECORD or PLAY, or transport is TCP
 				if (ss.state != ServerSessionStateRecord &&
 					ss.state != ServerSessionStatePlay) ||
 					*ss.setuppedTransport == TransportTCP {
-					// close if there are no associated connections
+					// close session if there are no associated connections
 					if len(ss.conns) == 0 {
 						return liberrors.ErrServerSessionNotInUse{}
 					}