Clean up duplicate imports

Author: djc

src/layer.rs

@@ -1165,18 +1165,13 @@ fn thread_id_integer(id: thread::ThreadId) -> u64 {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::OtelData;
-    use opentelemetry::{
-        trace::{noop, TraceFlags},
-        StringValue,
-    };
+    use opentelemetry::trace::TraceFlags;
     use std::{
         borrow::Cow,
         collections::HashMap,
         error::Error,
         fmt::Display,
         sync::{Arc, Mutex},
-        thread,
         time::SystemTime,
     };
     use tracing_subscriber::prelude::*;

src/tracer.rs

@@ -158,7 +158,7 @@ fn process_sampling_result(
 mod tests {
     use super::*;
     use crate::OtelData;
-    use opentelemetry::trace::{SpanBuilder, SpanId, TracerProvider as _};
+    use opentelemetry::trace::TracerProvider as _;
     use opentelemetry_sdk::trace::{config, Sampler, TracerProvider};
 
     #[test]