remove unused option deployment-controller-sync-period for deployment controller

pkg/controller/deployment/config/v1alpha1/defaults.go

@@ -17,9 +17,6 @@ limitations under the License.
 package v1alpha1
 
 import (
-	"time"
-
-	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	kubectrlmgrconfigv1alpha1 "k8s.io/kube-controller-manager/config/v1alpha1"
 )
 
@@ -33,11 +30,7 @@ import (
 // be no easy way to opt-out. Instead, if you want to use this defaulting method
 // run it in your wrapper struct of this type in its `SetDefaults_` method.
 func RecommendedDefaultDeploymentControllerConfiguration(obj *kubectrlmgrconfigv1alpha1.DeploymentControllerConfiguration) {
-	zero := metav1.Duration{}
 	if obj.ConcurrentDeploymentSyncs == 0 {
 		obj.ConcurrentDeploymentSyncs = 5
 	}
-	if obj.DeploymentControllerSyncPeriod == zero {
-		obj.DeploymentControllerSyncPeriod = metav1.Duration{Duration: 30 * time.Second}
-	}
 }