[opentelemetry-otlp] basic-otlp-http example - trivial cleanup (#1878)

Co-authored-by: Cijo Thomas <[email protected]>

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

@@ -50,19 +50,15 @@ fn init_tracer_provider() -> Result<sdktrace::TracerProvider, TraceError> {
 }
 
 fn init_metrics() -> Result<opentelemetry_sdk::metrics::SdkMeterProvider, MetricsError> {
- let provider = opentelemetry_otlp::new_pipeline()
+ opentelemetry_otlp::new_pipeline()
  .metrics(opentelemetry_sdk::runtime::Tokio)
  .with_exporter(
  opentelemetry_otlp::new_exporter()
  .http()
  .with_endpoint("http://localhost:4318/v1/metrics"),
  )
  .with_resource(RESOURCE.clone())
- .build();
- match provider {
- Ok(provider) => Ok(provider),
- Err(err) => Err(err),
- }
+ .build()
 }
 
 #[tokio::main]
@@ -85,6 +81,7 @@ async fn main() -> Result<(), Box<dyn Error + Send + Sync + 'static>> {
  );
 
  let meter_provider = result.unwrap();
+ global::set_meter_provider(meter_provider.clone());
 
  // Opentelemetry will not provide a global API to manage the logger
  // provider. Application users must manage the lifecycle of the logger