imporove: update the detector dashboard (#100)

Signed-off-by: ericsyh <[email protected]>

Author: ericsyh

dashboards.kubernetes/proxy.json

@@ -1143,7 +1143,6 @@
           "text": "All",
           "value": "$__all"
         },
-
         "datasource": {
           "type": "prometheus",
           "uid": "${DataSource}"