Fix some lints

opentelemetry-sdk/src/logs/log_emitter.rs

@@ -312,7 +312,7 @@ mod tests {
     use opentelemetry::{Key, KeyValue, Value};
     use std::fmt::{Debug, Formatter};
     use std::sync::atomic::AtomicU64;
-    use std::sync::{Arc, Mutex};
+    use std::sync::Mutex;
     use std::thread;
 
     struct ShutdownTestLogProcessor {

opentelemetry-sdk/src/metrics/periodic_reader.rs

@@ -291,7 +291,7 @@ impl<RT: Runtime> PeriodicReaderWorker<RT> {
         true
     }
 
-    async fn run(mut self, mut messages: impl Unpin + FusedStream<Item = Message>) {
+    async fn run(mut self, mut messages: impl FusedStream<Item = Message> + Unpin) {
         while let Some(message) = messages.next().await {
             if !self.process_message(message).await {
                 break;

opentelemetry-sdk/src/trace/span_processor.rs

@@ -422,7 +422,7 @@ impl<R: RuntimeChannel> BatchSpanProcessorInternal<R> {
         })
     }
 
-    async fn run(mut self, mut messages: impl Unpin + FusedStream<Item = BatchMessage>) {
+    async fn run(mut self, mut messages: impl FusedStream<Item = BatchMessage> + Unpin) {
         loop {
             select! {
                 // FuturesUnordered implements Fuse intelligently such that it

opentelemetry-zipkin/src/lib.rs

@@ -84,7 +84,7 @@
 //! [`ZipkinPipelineBuilder`] docs for details of each option.
 //!
 //!
-//! ```no_run,ignore
+//! ```no_run
 //! use opentelemetry::{global, KeyValue, trace::Tracer};
 //! use opentelemetry_sdk::{trace::{self, RandomIdGenerator, Sampler}, Resource};
 //! use opentelemetry_sdk::export::trace::ExportResult;