fix clippy warning

Author: ifsheldon

async-openai/src/types/impls.rs

@@ -18,7 +18,7 @@ use super::{
     EmbeddingInput, FileExpiresAfterAnchor, FileInput, FilePurpose, FunctionName, ImageInput,
     ImageModel, ImageResponseFormat, ImageSize, ImageUrl, ModerationInput, Prompt, Role, Stop,
     TimestampGranularity, VideoSize,
-    responses::{CodeInterpreterContainer, Input, InputContent, Role as ResponsesRole},
+    responses::{CodeInterpreterContainer, Input, InputContent},
 };
 use crate::traits::AsyncTryFrom;
 use crate::{error::OpenAIError, types::InputSource, util::create_file_part};
@@ -991,12 +991,6 @@ impl From<&str> for Input {
     }
 }
 
-impl Default for ResponsesRole {
-    fn default() -> Self {
-        Self::User
-    }
-}
-
 impl From<String> for InputContent {
     fn from(value: String) -> Self {
         Self::TextInput(value)

async-openai/src/types/responses.rs

@@ -10,9 +10,10 @@ use serde_json::Value;
 use std::collections::HashMap;
 
 /// Role of messages in the API.
-#[derive(Debug, Serialize, Deserialize, Clone, Copy, PartialEq)]
+#[derive(Debug, Serialize, Deserialize, Clone, Copy, PartialEq, Default)]
 #[serde(rename_all = "lowercase")]
 pub enum Role {
+    #[default]
     User,
     Assistant,
     System,