Fix warnings

Author: aumetra

opentelemetry-jaeger/src/exporter/thrift/agent.rs

@@ -3,7 +3,7 @@
 
 #![allow(unused_imports)]
 #![allow(unused_extern_crates)]
-#![cfg_attr(clippy, allow(clippy::too_many_arguments, clippy::type_complexity))]
+#![allow(clippy::too_many_arguments, clippy::type_complexity)]
 #![cfg_attr(rustfmt, rustfmt_skip)]
 
 extern crate thrift;

opentelemetry-jaeger/src/exporter/thrift/jaeger.rs

@@ -3,7 +3,7 @@
 
 #![allow(unused_imports)]
 #![allow(unused_extern_crates)]
-#![cfg_attr(clippy, allow(clippy::too_many_arguments, clippy::type_complexity))]
+#![allow(clippy::too_many_arguments, clippy::type_complexity)]
 #![cfg_attr(rustfmt, rustfmt_skip)]
 
 extern crate thrift;

opentelemetry-jaeger/src/exporter/thrift/zipkincore.rs

@@ -3,7 +3,7 @@
 
 #![allow(unused_imports)]
 #![allow(unused_extern_crates)]
-#![cfg_attr(clippy, allow(clippy::too_many_arguments, clippy::type_complexity))]
+#![allow(clippy::too_many_arguments, clippy::type_complexity)]
 #![cfg_attr(rustfmt, rustfmt_skip)]
 
 extern crate thrift;

opentelemetry-otlp/examples/basic-otlp-http/src/main.rs

@@ -75,7 +75,7 @@ static COMMON_ATTRIBUTES: Lazy<[KeyValue; 4]> = Lazy::new(|| {
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn Error + Send + Sync + 'static>> {
     let _ = init_tracer()?;
-    let _ = init_metrics()?;
+    let () = init_metrics()?;
     // Opentelemetry will not provide a global API to manage the logger provider. Application users must manage the lifecycle of the logger provider on their own. Dropping logger providers will disable log emitting.
     let logger_provider = init_logs().unwrap();
 

opentelemetry-otlp/examples/basic-otlp/src/main.rs

@@ -90,7 +90,7 @@ async fn main() -> Result<(), Box<dyn Error + Send + Sync + 'static>> {
     // matches the containing block, reporting traces and metrics during the whole
     // execution.
     let _ = init_tracer()?;
-    let _ = init_metrics()?;
+    let () = init_metrics()?;
 
     // Initialize logs, which sets the global loggerprovider.
     let logger_provider = init_logs().unwrap();