Merge pull request kubernetes#90500 from tanjunchen/remove-prometheus_import_allow_list-20200426

remove staging/src/k8s.io/apiserver/pkg/admission/metrics/ in prometheus_import_allow_list

Author: k8s-ci-robot

staging/src/k8s.io/component-base/metrics/BUILD

@@ -91,7 +91,6 @@ package_group(
         "//cluster/images/etcd-version-monitor",
         "//pkg/scheduler/framework/v1alpha1",
         "//pkg/volume/util/operationexecutor",
-        "//staging/src/k8s.io/apiserver/pkg/admission/metrics",
         "//staging/src/k8s.io/apiserver/pkg/util/flowcontrol/metrics",
         "//staging/src/k8s.io/component-base/metrics/...",
         "//test/e2e_node",