Fix golint failures in some pkg/kubelet packages

Fixed:
- pkg/kubelet/pod
- pkg/kubelet/metrics
- pkg/kubelet/configmap
- pkg/kubelet/config

pkg/kubelet/config/apiserver.go

@@ -14,7 +14,6 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// Reads the pod configuration from the Kubernetes apiserver.
 package config
 
 import (