improve comment and error

crates/obs/src/metrics/cluster_config.rs

@@ -1,12 +1,12 @@
+/// Metric descriptors related to cluster configuration
 use crate::metrics::{new_gauge_md, subsystems, MetricDescriptor, MetricName};
 
-/// 集群配置相关指标描述符
 lazy_static::lazy_static! {
     pub static ref CONFIG_RRS_PARITY_MD: MetricDescriptor =
         new_gauge_md(
             MetricName::ConfigRRSParity,
             "Reduced redundancy storage class parity",
-            &[],  // 无标签
+            &[],
             subsystems::CLUSTER_CONFIG
         );
 
@@ -14,7 +14,7 @@ lazy_static::lazy_static! {
         new_gauge_md(
             MetricName::ConfigStandardParity,
             "Standard storage class parity",
-            &[],  // 无标签
+            &[],
             subsystems::CLUSTER_CONFIG
         );
 }