diff --git a/pkg/kubelet/stats/provider.go b/pkg/kubelet/stats/provider.go
index 5a8bb4abfa3..1241111236a 100644
--- a/pkg/kubelet/stats/provider.go
+++ b/pkg/kubelet/stats/provider.go
@@ -85,7 +85,6 @@ type Provider struct {
 	podManager   kubepod.Manager
 	runtimeCache kubecontainer.RuntimeCache
 	containerStatsProvider
-	rlimitStatsProvider
 }
 
 // containerStatsProvider is an interface that provides the stats of the
@@ -98,10 +97,6 @@ type containerStatsProvider interface {
 	ImageFsDevice(ctx context.Context) (string, error)
 }
 
-type rlimitStatsProvider interface {
-	RlimitStats() (*statsapi.RlimitStats, error)
-}
-
 // RlimitStats returns base information about process count
 func (p *Provider) RlimitStats() (*statsapi.RlimitStats, error) {
 	return pidlimit.Stats()
diff --git a/staging/src/k8s.io/component-base/metrics/metric.go b/staging/src/k8s.io/component-base/metrics/metric.go
index b3d0dd264f5..3b22d21ef25 100644
--- a/staging/src/k8s.io/component-base/metrics/metric.go
+++ b/staging/src/k8s.io/component-base/metrics/metric.go
@@ -215,7 +215,6 @@ var noopCounterVec = &prometheus.CounterVec{}
 var noopHistogramVec = &prometheus.HistogramVec{}
 var noopTimingHistogramVec = &promext.TimingHistogramVec{}
 var noopGaugeVec = &prometheus.GaugeVec{}
-var noopObserverVec = &noopObserverVector{}
 
 // just use a convenience struct for all the no-ops
 var noop = &noopMetric{}
@@ -234,22 +233,3 @@ func (noopMetric) Desc() *prometheus.Desc            { return nil }
 func (noopMetric) Write(*dto.Metric) error           { return nil }
 func (noopMetric) Describe(chan<- *prometheus.Desc)  {}
 func (noopMetric) Collect(chan<- prometheus.Metric)  {}
-
-type noopObserverVector struct{}
-
-func (noopObserverVector) GetMetricWith(prometheus.Labels) (prometheus.Observer, error) {
-	return noop, nil
-}
-func (noopObserverVector) GetMetricWithLabelValues(...string) (prometheus.Observer, error) {
-	return noop, nil
-}
-func (noopObserverVector) With(prometheus.Labels) prometheus.Observer    { return noop }
-func (noopObserverVector) WithLabelValues(...string) prometheus.Observer { return noop }
-func (noopObserverVector) CurryWith(prometheus.Labels) (prometheus.ObserverVec, error) {
-	return noopObserverVec, nil
-}
-func (noopObserverVector) MustCurryWith(prometheus.Labels) prometheus.ObserverVec {
-	return noopObserverVec
-}
-func (noopObserverVector) Describe(chan<- *prometheus.Desc) {}
-func (noopObserverVector) Collect(chan<- prometheus.Metric) {}
diff --git a/test/e2e/storage/vsphere/pvc_label_selector.go b/test/e2e/storage/vsphere/pvc_label_selector.go
index c458e7ecdfe..1cb446f5bca 100644
--- a/test/e2e/storage/vsphere/pvc_label_selector.go
+++ b/test/e2e/storage/vsphere/pvc_label_selector.go
@@ -111,7 +111,6 @@ var _ = utils.SIGDescribe("PersistentVolumes [Feature:vsphere][Feature:LabelSele
 
 func testSetupVSpherePVClabelselector(ctx context.Context, c clientset.Interface, nodeInfo *NodeInfo, ns string, ssdlabels map[string]string, vvollabels map[string]string) (volumePath string, pvSsd *v1.PersistentVolume, pvcSsd *v1.PersistentVolumeClaim, pvcVvol *v1.PersistentVolumeClaim, err error) {
 	ginkgo.By("creating vmdk")
-	volumePath = ""
 	volumePath, err = nodeInfo.VSphere.CreateVolume(&VolumeOptions{}, nodeInfo.DataCenterRef)
 	if err != nil {
 		return
diff --git a/test/integration/apiserver/discovery/discovery_test.go b/test/integration/apiserver/discovery/discovery_test.go
index b27dbecb2b4..6446997d343 100644
--- a/test/integration/apiserver/discovery/discovery_test.go
+++ b/test/integration/apiserver/discovery/discovery_test.go
@@ -52,9 +52,16 @@ import (
 	"k8s.io/kubernetes/test/integration/framework"
 )
 
+//lint:ignore U1000 we need to alias only for the sake of embedding
 type kubeClientSet = kubernetes.Interface
+
+//lint:ignore U1000 we need to alias only for the sake of embedding
 type aggegatorClientSet = aggregator.Interface
+
+//lint:ignore U1000 we need to alias only for the sake of embedding
 type apiextensionsClientSet = apiextensions.Interface
+
+//lint:ignore U1000 we need to alias only for the sake of embedding
 type dynamicClientset = dynamic.Interface
 type testClientSet struct {
 	kubeClientSet