[VOL-4968] added mandatory uni-id optional vlan-id params, remove igmp event mechanism

Change-Id: Id103b8bb2d882b6b02ac483c44f57639fbd62ba1
diff --git a/internal/bbr/devices/olt.go b/internal/bbr/devices/olt.go
index 873a464..377ca50 100644
--- a/internal/bbr/devices/olt.go
+++ b/internal/bbr/devices/olt.go
@@ -20,7 +20,6 @@
 	"context"
 	"encoding/hex"
 	"fmt"
-	"github.com/opencord/bbsim/internal/bbsim/types"
 	"io"
 	"reflect"
 	"time"
@@ -29,6 +28,7 @@
 	"github.com/google/gopacket/layers"
 	"github.com/opencord/bbsim/internal/bbsim/devices"
 	"github.com/opencord/bbsim/internal/bbsim/packetHandlers"
+	"github.com/opencord/bbsim/internal/bbsim/types"
 	"github.com/opencord/bbsim/internal/common"
 	"github.com/opencord/voltha-protos/v5/go/openolt"
 	log "github.com/sirupsen/logrus"