[VOL-3285] Resolving statis code analysis warnings

Change-Id: Iaddaae92c649fd27ce0a63f1786af594667c9e8e
diff --git a/internal/bbsim/devices/nni.go b/internal/bbsim/devices/nni.go
index fabe69c..e74e97b 100644
--- a/internal/bbsim/devices/nni.go
+++ b/internal/bbsim/devices/nni.go
@@ -71,7 +71,7 @@
 		}),
 		Type: "nni",
 	}
-	createNNIPair(executor, olt, &nniPort)
+	_ = createNNIPair(executor, olt, &nniPort)
 	return nniPort, nil
 }
 
@@ -81,7 +81,7 @@
 	isDhcp := packetHandlers.IsDhcpPacket(packet)
 	isLldp := packetHandlers.IsLldpPacket(packet)
 
-	if isDhcp == false && isLldp == false {
+	if !isDhcp && !isLldp {
 		nniLogger.WithFields(log.Fields{
 			"packet": packet,
 		}).Trace("Dropping NNI packet as it's not DHCP")
@@ -145,14 +145,6 @@
 	return nil
 }
 
-func deleteNNIPair(executor Executor, nniPort *NniPort) error {
-	if err := executor.Command("ip", "link", "del", nniPort.nniVeth).Run(); err != nil {
-		nniLogger.Errorf("Couldn't delete veth pair between %s and %s", nniPort.nniVeth, nniPort.upstreamVeth)
-		return err
-	}
-	return nil
-}
-
 // NewVethChan returns a new channel for receiving packets over the NNI interface
 func (n *NniPort) NewVethChan() (chan *types.PacketMsg, *pcap.Handle, error) {
 	ch, handle, err := listenOnVeth(n.nniVeth)