Merge pull request #50729 from allencloud/remove-redundant-error-test-case

Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

remove redundant error test case in autoscaling validation

Signed-off-by: allencloud <allen.sun@daocloud.io>



**What this PR does / why we need it**:
I think the error test case I removed is the same as https://github.com/kubernetes/kubernetes/blob/master/pkg/apis/autoscaling/validation/validation_test.go#L393-L412 .
So maybe removal of this part is proper, since it would reduce the codes and save a little bit time in testing.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
NONE

**Special notes for your reviewer**:
NONE

**Release note**:

```release-note
NONE
```

pkg/apis/autoscaling/validation/validation_test.go

@@ -321,32 +321,6 @@ func TestValidateHorizontalPodAutoscaler(t *testing.T) {
 			},
 			msg: "must be greater than or equal to `minReplicas`",
 		},
-		{
-			horizontalPodAutoscaler: autoscaling.HorizontalPodAutoscaler{
-				ObjectMeta: metav1.ObjectMeta{
-					Name:      "myautoscaler",
-					Namespace: metav1.NamespaceDefault,
-				},
-				Spec: autoscaling.HorizontalPodAutoscalerSpec{
-					ScaleTargetRef: autoscaling.CrossVersionObjectReference{
-						Kind: "ReplicationController",
-						Name: "myrc",
-					},
-					MinReplicas: newInt32(1),
-					MaxReplicas: 5,
-					Metrics: []autoscaling.MetricSpec{
-						{
-							Type: autoscaling.ResourceMetricSourceType,
-							Resource: &autoscaling.ResourceMetricSource{
-								Name: api.ResourceCPU,
-								TargetAverageUtilization: newInt32(-70),
-							},
-						},
-					},
-				},
-			},
-			msg: "must be greater than 0",
-		},
 		{
 			horizontalPodAutoscaler: autoscaling.HorizontalPodAutoscaler{
 				ObjectMeta: metav1.ObjectMeta{