remove conversion to sec from disk_io_time

remove conversion to sec from host overview dashboard since telegraph
disk_io_time is already in seconds.

Change-Id: I7993add1fdf2d0351bc914c04dca2a4e70b8e7aa
Related-Prod: PROD-30652
diff --git a/ceph/files/grafana_dashboards/hosts-overview_prometheus.json b/ceph/files/grafana_dashboards/hosts-overview_prometheus.json
index 93314e2..921f886 100644
--- a/ceph/files/grafana_dashboards/hosts-overview_prometheus.json
+++ b/ceph/files/grafana_dashboards/hosts-overview_prometheus.json
@@ -577,7 +577,7 @@
       "tableColumn": "Value",
       "targets": [
         {
-          "expr": "avg ( (irate(diskio_io_time{host=~\"($osd_hosts).*\"}[5m]) / 10 ) )",
+          "expr": "avg ( (irate(diskio_io_time{host=~\"($osd_hosts).*\"}[5m])) )",
           "format": "table",
           "instant": true,
           "intervalFactor": 1,