drop iam from google testing library

Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>

gcsfs/internal/stiface/interfaces.go

@@ -18,7 +18,6 @@ import (
 	"context"
 	"io"
 
-	"cloud.google.com/go/iam"
 	"cloud.google.com/go/storage"
 	"google.golang.org/api/iterator"
 )
@@ -59,7 +58,7 @@ type BucketHandle interface {
 	If(storage.BucketConditions) BucketHandle
 	Objects(context.Context, *storage.Query) ObjectIterator
 	ACL() ACLHandle
-	IAM() *iam.Handle
+	// IAM() *iam.Handle
 	UserProject(projectID string) BucketHandle
 	Notifications(context.Context) (map[string]*storage.Notification, error)
 	AddNotification(context.Context, *storage.Notification) (*storage.Notification, error)

go.mod

@@ -3,7 +3,6 @@ module github.com/spf13/afero
 go 1.19
 
 require (
-	cloud.google.com/go/iam v1.1.5
 	cloud.google.com/go/storage v1.35.1
 	github.com/pkg/sftp v1.13.6
 	golang.org/x/crypto v0.16.0
@@ -16,6 +15,7 @@ require (
 	cloud.google.com/go v0.110.10 // indirect
 	cloud.google.com/go/compute v1.23.3 // indirect
 	cloud.google.com/go/compute/metadata v0.2.3 // indirect
+	cloud.google.com/go/iam v1.1.5 // indirect
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/google/s2a-go v0.1.7 // indirect