Fix clippy error

Author: rylev

sdk/core/src/options.rs

@@ -15,37 +15,20 @@ use std::time::Duration;
 ///     .retry(RetryOptions::default().max_retries(10u32))
 ///     .telemetry(TelemetryOptions::default().application_id("my-application"));
 /// ```
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, Default)]
 pub struct ClientOptions {
-    // TODO: Expose transport override.
     /// Policies called per call.
     pub(crate) per_call_policies: Vec<Arc<dyn Policy>>,
-
     /// Policies called per retry.
     pub(crate) per_retry_policies: Vec<Arc<dyn Policy>>,
-
     /// Retry options.
     pub(crate) retry: RetryOptions,
-
     /// Telemetry options.
     pub(crate) telemetry: TelemetryOptions,
-
     /// Transport options.
     pub(crate) transport: TransportOptions,
 }
 
-impl Default for ClientOptions {
-    fn default() -> Self {
-        Self {
-            per_call_policies: Vec::new(),
-            per_retry_policies: Vec::new(),
-            retry: RetryOptions::default(),
-            telemetry: TelemetryOptions::default(),
-            transport: TransportOptions::default(),
-        }
-    }
-}
-
 impl ClientOptions {
     pub fn new() -> Self {
         Self::default()