Merge pull request kubernetes#126774 from aramase/aramase/c/sa_rm_unused_function

cleanup unused fn GetOrCreateServiceAccount in serviceaccount/util

Author: k8s-ci-robot

staging/src/k8s.io/apiserver/pkg/authentication/serviceaccount/util.go

@@ -17,18 +17,12 @@ limitations under the License.
 package serviceaccount
 
 import (
-	"context"
 	"fmt"
 	"strings"
 
 	v1 "k8s.io/api/core/v1"
-	apierrors "k8s.io/apimachinery/pkg/api/errors"
 	apimachineryvalidation "k8s.io/apimachinery/pkg/api/validation"
-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apiserver/pkg/authentication/user"
-	v1core "k8s.io/client-go/kubernetes/typed/core/v1"
-
-	"k8s.io/klog/v2"
 )
 
 const (
@@ -200,29 +194,3 @@ func IsServiceAccountToken(secret *v1.Secret, sa *v1.ServiceAccount) bool {
 
 	return true
 }
-
-func GetOrCreateServiceAccount(coreClient v1core.CoreV1Interface, namespace, name string) (*v1.ServiceAccount, error) {
-	sa, err := coreClient.ServiceAccounts(namespace).Get(context.TODO(), name, metav1.GetOptions{})
-	if err == nil {
-		return sa, nil
-	}
-	if !apierrors.IsNotFound(err) {
-		return nil, err
-	}
-
-	// Create the namespace if we can't verify it exists.
-	// Tolerate errors, since we don't know whether this component has namespace creation permissions.
-	if _, err := coreClient.Namespaces().Get(context.TODO(), namespace, metav1.GetOptions{}); apierrors.IsNotFound(err) {
-		if _, err = coreClient.Namespaces().Create(context.TODO(), &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: namespace}}, metav1.CreateOptions{}); err != nil && !apierrors.IsAlreadyExists(err) {
-			klog.Warningf("create non-exist namespace %s failed:%v", namespace, err)
-		}
-	}
-
-	// Create the service account
-	sa, err = coreClient.ServiceAccounts(namespace).Create(context.TODO(), &v1.ServiceAccount{ObjectMeta: metav1.ObjectMeta{Namespace: namespace, Name: name}}, metav1.CreateOptions{})
-	if apierrors.IsAlreadyExists(err) {
-		// If we're racing to init and someone else already created it, re-fetch
-		return coreClient.ServiceAccounts(namespace).Get(context.TODO(), name, metav1.GetOptions{})
-	}
-	return sa, err
-}