Merge pull request #41650 from rhcs-dashboard/wip-50426-nautilus

nautilus: mgr/Dashboard: Remove erroneous elements in hosts-overview Grafana dashboard

Reviewed-by: Waad Alkhoury <walkhour@redhat.com>
Reviewed-by: Aashish Sharma <aasharma@redhat.com>
Reviewed-by: Avan Thakkar <athakkar@redhat.com>
Reviewed-by: Pere Diaz Bou <pdiazbou@redhat.com>

monitoring/grafana/dashboards/hosts-overview.json

@@ -131,7 +131,6 @@
         "#d44a3a"
       ],
       "datasource": "$datasource",
-      "decimals": 0,
       "description": "Average CPU busy across all hosts (OSD, RGW, MON etc) within the cluster",
       "decimals": 2,
       "format": "percentunit",
@@ -215,7 +214,6 @@
         "#d44a3a"
       ],
       "datasource": "$datasource",
-      "decimals": 0,
       "description": "Average Memory Usage across all hosts in the cluster (excludes buffer/cache usage)",
       "decimals": 2,
       "format": "percentunit",