remove all opentracing leftovers

go.mod

@@ -7,7 +7,6 @@ require (
 	github.com/Azure/go-autorest v12.0.0+incompatible
 	github.com/joho/godotenv v1.3.0
 	github.com/mitchellh/mapstructure v1.1.2
-	github.com/opentracing/opentracing-go v1.0.2
 	github.com/stretchr/objx v0.1.1 // indirect
 	github.com/stretchr/testify v1.2.2
 	go.opencensus.io v0.21.0

iterator_examples_test.go

@@ -3,8 +3,8 @@ package servicebus_test
 import (
 	"context"
 	"fmt"
+
 	"github.com/Azure/azure-service-bus-go"
-	"github.com/opentracing/opentracing-go/log"
 )
 
 func ExampleMessageIterator() {
@@ -16,7 +16,8 @@ func ExampleMessageIterator() {
 	for !subject.Done() {
 		cursor, err := subject.Next(context.Background())
 		if err != nil {
-			log.Error(err)
+			fmt.Println(err)
+			return
 		}
 		fmt.Println(string(cursor.Data))
 	}