refactor(kubernetes): Delete unused code (#4133)

This code was part of a temporary implementation of authorization
checks that has now been replaced. We can now delete the code.

clouddriver-kubernetes-v2/src/main/java/com/netflix/spinnaker/clouddriver/kubernetes/v2/op/job/KubectlJobExecutor.java

@@ -31,7 +31,6 @@
 import com.netflix.spinnaker.clouddriver.kubernetes.v2.description.KubernetesPodMetric.ContainerMetric;
 import com.netflix.spinnaker.clouddriver.kubernetes.v2.description.manifest.KubernetesKind;
 import com.netflix.spinnaker.clouddriver.kubernetes.v2.description.manifest.KubernetesManifest;
-import com.netflix.spinnaker.clouddriver.kubernetes.v2.security.KubernetesApiResourceParser;
 import com.netflix.spinnaker.clouddriver.kubernetes.v2.security.KubernetesSelectorList;
 import com.netflix.spinnaker.clouddriver.kubernetes.v2.security.KubernetesV2Credentials;
 import io.kubernetes.client.models.V1DeleteOptions;
@@ -599,51 +598,6 @@ private String getOAuthToken(KubernetesV2Credentials credentials) {
     return status.getOutput();
   }
 
-  public Set<KubernetesKind> apiResources(KubernetesV2Credentials credentials) {
-    List<String> command = kubectlAuthPrefix(credentials);
-    command.add("api-resources");
-
-    JobResult<String> status = jobExecutor.runJob(new JobRequest(command));
-
-    // api-resources can return a non-zero status code but still return data
-    // log here as a warning
-    if (!status.getResult().equals(JobResult.Result.SUCCESS)) {
-      log.warn("There was an error reading api-resources. All available kinds may not be present.");
-    }
-
-    String output = status.getOutput().trim();
-    if (StringUtils.isEmpty(output)) {
-      return new HashSet<>();
-    }
-
-    return KubernetesApiResourceParser.parse(output);
-  }
-
-  public boolean authCanI(KubernetesV2Credentials credentials, String kind, String verb) {
-    List<String> command = kubectlAuthPrefix(credentials);
-    command.add("auth");
-    command.add("can-i");
-    command.add(verb);
-    command.add(kind);
-
-    JobResult<String> status = jobExecutor.runJob(new JobRequest(command));
-
-    return status.getResult() == JobResult.Result.SUCCESS;
-  }
-
-  public boolean authCanINamespaced(
-      KubernetesV2Credentials credentials, String namespace, String kind, String verb) {
-    List<String> command = kubectlNamespacedAuthPrefix(credentials, namespace);
-    command.add("auth");
-    command.add("can-i");
-    command.add(verb);
-    command.add(kind);
-
-    JobResult<String> status = jobExecutor.runJob(new JobRequest(command));
-
-    return status.getResult() == JobResult.Result.SUCCESS;
-  }
-
   public Collection<KubernetesPodMetric> topPod(
       KubernetesV2Credentials credentials, String namespace, String pod) {
     List<String> command = kubectlNamespacedAuthPrefix(credentials, namespace);