fix lint

Author: lalitb

opentelemetry-sdk/src/metrics/internal/sum.rs

@@ -21,7 +21,7 @@ struct ValueMap<T: Number<T>> {
     buckets: Arc<HashMap<u8, Mutex<HashMap<AttributeSet, T>>>>,
     has_no_value_attribute_value: AtomicBool,
     no_attribute_value: T::AtomicTracker,
-    total_count: AtomicUsize, // Add this line
+    total_count: AtomicUsize,
 }
 
 impl<T: Number<T>> Default for ValueMap<T> {

opentelemetry-sdk/src/testing/metrics/in_memory_exporter.rs

@@ -285,7 +285,7 @@ impl TemporalitySelector for InMemoryMetricsExporter {
 #[async_trait]
 impl PushMetricsExporter for InMemoryMetricsExporter {
     async fn export(&self, metrics: &mut ResourceMetrics) -> Result<()> {
-        if metrics.scope_metrics.len() == 0 || metrics.scope_metrics[0].metrics.len() == 0 {
+        if metrics.scope_metrics.is_empty() || metrics.scope_metrics[0].metrics.is_empty() {
             return Ok(());
         }
         self.metrics