diff --git a/staging/src/k8s.io/apiserver/pkg/server/options/deprecated_insecure_serving.go b/staging/src/k8s.io/apiserver/pkg/server/options/deprecated_insecure_serving.go
index 2b3afb0f161..173c28b80d0 100644
--- a/staging/src/k8s.io/apiserver/pkg/server/options/deprecated_insecure_serving.go
+++ b/staging/src/k8s.io/apiserver/pkg/server/options/deprecated_insecure_serving.go
@@ -23,7 +23,6 @@ import (
 	"github.com/spf13/pflag"
 
 	"k8s.io/apiserver/pkg/server"
-	"k8s.io/client-go/rest"
 )
 
 // DeprecatedInsecureServingOptions are for creating an unauthenticated, unauthorized, insecure port.
@@ -125,45 +124,3 @@ func (s *DeprecatedInsecureServingOptions) ApplyTo(c **server.DeprecatedInsecure
 
 	return nil
 }
-
-// WithLoopback adds loopback functionality to the serving options.
-func (o *DeprecatedInsecureServingOptions) WithLoopback() *DeprecatedInsecureServingOptionsWithLoopback {
-	return &DeprecatedInsecureServingOptionsWithLoopback{o}
-}
-
-// DeprecatedInsecureServingOptionsWithLoopback adds loopback functionality to the DeprecatedInsecureServingOptions.
-// DEPRECATED: all insecure serving options will be removed in a future version, however note that
-// there are security concerns over how health checks can work here - see e.g. #43784
-type DeprecatedInsecureServingOptionsWithLoopback struct {
-	*DeprecatedInsecureServingOptions
-}
-
-// ApplyTo fills up serving information in the server configuration.
-func (s *DeprecatedInsecureServingOptionsWithLoopback) ApplyTo(insecureServingInfo **server.DeprecatedInsecureServingInfo, loopbackClientConfig **rest.Config) error {
-	if s == nil || s.DeprecatedInsecureServingOptions == nil || insecureServingInfo == nil {
-		return nil
-	}
-
-	if err := s.DeprecatedInsecureServingOptions.ApplyTo(insecureServingInfo); err != nil {
-		return err
-	}
-
-	if *insecureServingInfo == nil || loopbackClientConfig == nil {
-		return nil
-	}
-
-	secureLoopbackClientConfig, err := (*insecureServingInfo).NewLoopbackClientConfig()
-	switch {
-	// if we failed and there's no fallback loopback client config, we need to fail
-	case err != nil && *loopbackClientConfig == nil:
-		return err
-
-		// if we failed, but we already have a fallback loopback client config (usually insecure), allow it
-	case err != nil && *loopbackClientConfig != nil:
-
-	default:
-		*loopbackClientConfig = secureLoopbackClientConfig
-	}
-
-	return nil
-}