[router] remove old/oudated/useless comments across code base (#10968)

sgl-router/src/metrics.rs

@@ -598,8 +598,6 @@ mod tests {
     use super::*;
     use std::net::TcpListener;
 
-    // ============= PrometheusConfig Tests =============
-
     #[test]
     fn test_prometheus_config_default() {
         let config = PrometheusConfig::default();
@@ -628,8 +626,6 @@ mod tests {
         assert_eq!(cloned.host, config.host);
     }
 
-    // ============= IP Address Parsing Tests =============
-
     #[test]
     fn test_valid_ipv4_parsing() {
         let test_cases = vec!["127.0.0.1", "192.168.1.1", "0.0.0.0"];
@@ -679,8 +675,6 @@ mod tests {
         }
     }
 
-    // ============= Socket Address Creation Tests =============
-
     #[test]
     fn test_socket_addr_creation() {
         let test_cases = vec![("127.0.0.1", 8080), ("0.0.0.0", 29000), ("::1", 9090)];
@@ -716,8 +710,6 @@ mod tests {
         }
     }
 
-    // ============= Duration Bucket Tests =============
-
     #[test]
     fn test_duration_bucket_coverage() {
         let test_cases: [(f64, &str); 7] = [
@@ -743,8 +735,6 @@ mod tests {
         }
     }
 
-    // ============= Matcher Configuration Tests =============
-
     #[test]
     fn test_duration_suffix_matcher() {
         let matcher = Matcher::Suffix(String::from("duration_seconds"));
@@ -763,8 +753,6 @@ mod tests {
         }
     }
 
-    // ============= Builder Configuration Tests =============
-
     #[test]
     fn test_prometheus_builder_configuration() {
         let _config = PrometheusConfig::default();
@@ -783,16 +771,12 @@ mod tests {
         }
     }
 
-    // ============= Upkeep Timeout Tests =============
-
     #[test]
     fn test_upkeep_timeout_duration() {
         let timeout = Duration::from_secs(5 * 60);
         assert_eq!(timeout.as_secs(), 300);
     }
 
-    // ============= Custom Bucket Tests =============
-
     #[test]
     fn test_custom_buckets_for_different_metrics() {
         let request_buckets = [0.001, 0.01, 0.1, 1.0, 10.0];
@@ -810,8 +794,6 @@ mod tests {
         }
     }
 
-    // ============= RouterMetrics Tests =============
-
     #[test]
     fn test_metrics_static_methods() {
         RouterMetrics::record_request("/generate");
@@ -876,8 +858,6 @@ mod tests {
         TokenizerMetrics::set_vocab_size("huggingface", 50000);
     }
 
-    // ============= Port Availability Tests =============
-
     #[test]
     fn test_port_already_in_use() {
         let port = 29123;
@@ -892,8 +872,6 @@ mod tests {
         }
     }
 
-    // ============= Integration Test Helpers =============
-
     #[test]
     fn test_metrics_endpoint_accessibility() {
         let config = PrometheusConfig {
@@ -937,8 +915,6 @@ mod tests {
         }
     }
 
-    // ============= Edge Cases Tests =============
-
     #[test]
     fn test_empty_string_metrics() {
         RouterMetrics::record_request("");