Address PR comments

Author: utpilla

opentelemetry-otlp/src/lib.rs

@@ -125,7 +125,6 @@
 //! # #[cfg(feature = "metrics")]
 //! use opentelemetry_sdk::metrics::reader::{DefaultAggregationSelector, DefaultTemporalitySelector};
 //! use opentelemetry_otlp::{Protocol, WithExportConfig, ExportConfig};
-//! use opentelemetry::trace::TracerProvider;
 //! use std::time::Duration;
 //! # #[cfg(feature = "grpc-tonic")]
 //! use tonic::metadata::*;
@@ -158,8 +157,8 @@
 //!                 .with_resource(Resource::new(vec![KeyValue::new("service.name", "example")])),
 //!         )
 //!         .install_batch(opentelemetry_sdk::runtime::Tokio)?;
-//!         global::set_tracer_provider(tracer_provider.clone());
-//!         let tracer = global::tracer_provider().tracer_builder("opentelemetry-otlp").build();
+//!         global::set_tracer_provider(tracer_provider);
+//!         let tracer = global::tracer("tracer-name");
 //!         # tracer
 //!     # };
 //!

opentelemetry-otlp/tests/smoke.rs

@@ -1,7 +1,7 @@
 use futures_util::StreamExt;
 use opentelemetry::global;
 use opentelemetry::global::shutdown_tracer_provider;
-use opentelemetry::trace::{Span, SpanKind, Tracer, TracerProvider};
+use opentelemetry::trace::{Span, SpanKind, Tracer};
 use opentelemetry_otlp::WithExportConfig;
 use opentelemetry_proto::tonic::collector::trace::v1::{
     trace_service_server::{TraceService, TraceServiceServer},
@@ -102,9 +102,9 @@ async fn smoke_tracer() {
             .install_batch(opentelemetry_sdk::runtime::Tokio)
             .expect("failed to install");
 
-        global::set_tracer_provider(tracer_provider.clone());
+        global::set_tracer_provider(tracer_provider);
 
-        let tracer = global::tracer_provider().tracer_builder("smoke").build();
+        let tracer = global::tracer("smoke");
 
         println!("Sending span...");
         let mut span = tracer