Revert "report udp stats from validator (solana-labs#20587)"

This reverts commit 46133b6.

core/src/lib.rs

@@ -49,7 +49,6 @@ pub mod sigverify;
 pub mod sigverify_shreds;
 pub mod sigverify_stage;
 pub mod snapshot_packager_service;
-pub mod system_monitor_service;
 pub mod test_validator;
 pub mod tower_storage;
 pub mod tpu;

core/src/validator.rs

@@ -14,7 +14,6 @@ use {
         serve_repair_service::ServeRepairService,
         sigverify,
         snapshot_packager_service::SnapshotPackagerService,
-        system_monitor_service::{verify_udp_stats_access, SystemMonitorService},
         tower_storage::TowerStorage,
         tpu::{Tpu, DEFAULT_TPU_COALESCE_MS},
         tvu::{Sockets, Tvu, TvuConfig},
@@ -276,7 +275,6 @@ pub struct Validator {
     transaction_status_service: Option<TransactionStatusService>,
     rewards_recorder_service: Option<RewardsRecorderService>,
     cache_block_meta_service: Option<CacheBlockMetaService>,
-    system_monitor_service: Option<SystemMonitorService>,
     sample_performance_service: Option<SamplePerformanceService>,
     gossip_service: GossipService,
     serve_repair_service: ServeRepairService,
@@ -450,12 +448,6 @@ impl Validator {
 
         *start_progress.write().unwrap() = ValidatorStartProgress::StartingServices;
 
-        verify_udp_stats_access().unwrap_or_else(|err| {
-            error!("Failed to access UDP stats: {}", err);
-            abort();
-        });
-        let system_monitor_service = Some(SystemMonitorService::new(Arc::clone(&exit)));
-
         let leader_schedule_cache = Arc::new(leader_schedule_cache);
         let bank = bank_forks.working_bank();
         if let Some(ref shrink_paths) = config.account_shrink_paths {
@@ -880,7 +872,6 @@ impl Validator {
             transaction_status_service,
             rewards_recorder_service,
             cache_block_meta_service,
-            system_monitor_service,
             sample_performance_service,
             snapshot_packager_service,
             completed_data_sets_service,
@@ -975,12 +966,6 @@ impl Validator {
                 .expect("cache_block_meta_service");
         }
 
-        if let Some(system_monitor_service) = self.system_monitor_service {
-            system_monitor_service
-                .join()
-                .expect("system_monitor_service");
-        }
-
         if let Some(sample_performance_service) = self.sample_performance_service {
             sample_performance_service
                 .join()