Replace unmaintained actions-rs/toolchain action. (open-telemetry#1655)

Co-authored-by: Zhongyang Wu <[email protected]>

Author: lalitb

logs.rs

@@ -1,39 +1,10 @@
 use opentelemetry_appender_tracing::layer;
 use opentelemetry_sdk::logs::{LogProcessor, LoggerProvider};
 use tracing::error;
-use tracing_subscriber::{prelude::*, Layer};
+use tracing_subscriber::prelude::*;
 
 mod throughput;
 
-struct NoopEventVisitor;
-
-impl tracing::field::Visit for NoopEventVisitor {
-    fn record_debug(&mut self, _field: &tracing::field::Field, _value: &dyn std::fmt::Debug) {}
-}
-
-struct NoOpLogLayer;
-impl<S> Layer<S> for NoOpLogLayer
-where
-    S: tracing::Subscriber,
-{
-    fn on_event(
-        &self,
-        event: &tracing::Event<'_>,
-        _ctx: tracing_subscriber::layer::Context<'_, S>,
-    ) {
-        let mut visitor = NoopEventVisitor;
-        event.record(&mut visitor);
-    }
-
-    fn event_enabled(
-        &self,
-        _event: &tracing::Event<'_>,
-        _ctx: tracing_subscriber::layer::Context<'_, S>,
-    ) -> bool {
-        true
-    }
-}
-
 #[derive(Debug)]
 pub struct NoOpLogProcessor;
 
@@ -67,12 +38,6 @@ fn main() {
     // Use the OpenTelemetryTracingBridge to test the throughput of the appender-tracing.
     let layer = layer::OpenTelemetryTracingBridge::new(&provider);
     tracing_subscriber::registry().with(layer).init();
-
-    // Use a "Do-Nothing" layer to test the throughput of the tracing system without
-    // OpenTelemetry overhead. This helps measure the OpenTelemetry overhead.
-    // let noop_layer = NoOpLogLayer;
-    // tracing_subscriber::registry().with(noop_layer).init();
-
     throughput::test_throughput(test_log);
 }