chore: remove unused imports (I don't know why they're not combining though)

src/server.rs

@@ -10,26 +10,17 @@ use axum::response::Sse;
 use axum_extra::routing::RouterExt;
 use axum_extra::routing::TypedPath;
 use ecow::EcoString;
-use ecow::string::ToEcoString;
-use futures::Stream;
-use futures::StreamExt as _;
-use futures::TryStreamExt as _;
 use headers::Header;
 use headers::authorization::Bearer;
-use indexmap::IndexMap;
 use mitsein::vec1::Vec1;
 use rand::Rng;
 use rand::RngExt;
-use reqwest_sse::EventSource;
 use secrecy::ExposeSecret;
 use secrecy::SecretString;
 use serde::Deserialize;
 use serde::Serialize;
 use std::collections::VecDeque;
-use std::hash::Hash;
-use std::pin::Pin;
 use std::sync::Arc;
-use tokio::sync::oneshot;
 use typed_builder::TypedBuilder;
 use url::Url;