Documentation/op-guide: remove git merge line in monitoring.md

Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>

Documentation/op-guide/monitoring.md

@@ -44,7 +44,6 @@ When	Elapsed (s)
 ## Metrics endpoint
 
 Each etcd server exports metrics under the `/metrics` path on its client port and optionally on interfaces given by `--listen-metrics-urls`.
->>>>>>> 607d0762e... Documentation/op-guide: remove grafana demo link
 
 The metrics can be fetched with `curl`: