Remove too frequent logs (#20454) (#20476)

Half of the log messages come from this log if DataNode in stale.
Signed-off-by: Nyangxuan <xuan.yang@zilliz.com>
Signed-off-by: Nyangxuan <xuan.yang@zilliz.com>

internal/datanode/data_node.go

@@ -801,13 +801,6 @@ func (node *DataNode) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsRe
 			}, nil
 		}
 
-		log.Debug("DataNode.GetMetrics",
-			zap.Int64("node_id", Params.DataNodeCfg.GetNodeID()),
-			zap.String("req", req.Request),
-			zap.String("metric_type", metricType),
-			zap.Any("systemInfoMetrics", systemInfoMetrics), // TODO(dragondriver): necessary? may be very large
-			zap.Error(err))
-
 		return systemInfoMetrics, nil
 	}