Delete outdated TODO for Issue #458 (#4601)

Co-authored-by: xiangying <[email protected]>

Author: liangyepianzhou

deploy/kubernetes/gke/bookkeeper.statefulset.yml

@@ -39,7 +39,6 @@ data:
     BK_ledgerDirectories: "/bookkeeper/data/ledgers"
     BK_indexDirectories: "/bookkeeper/data/ledgers"
     BK_zkServers: zookeeper
-    # TODO: Issue 458: https://github.com/apache/bookkeeper/issues/458
     #BK_statsProviderClass: org.apache.bookkeeper.stats.prometheus.PrometheusMetricsProvider
     # use hostname as bookie id for StatefulSets deployment
     BK_useHostNameAsBookieID: "true"

deploy/kubernetes/gke/bookkeeper.yaml

@@ -30,7 +30,6 @@ data:
     BK_ledgerDirectories: "/bookkeeper/data/ledgers"
     BK_indexDirectories: "/bookkeeper/data/ledgers"
     BK_zkServers: zookeeper
-    # TODO: Issue 458: https://github.com/apache/bookkeeper/issues/458
     #BK_statsProviderClass: org.apache.bookkeeper.stats.prometheus.PrometheusMetricsProvider
 ---