diff --git a/src/meta/dashboard/build.rs b/src/meta/dashboard/build.rs
index 4ca1fff65a345..851c1e199669a 100644
--- a/src/meta/dashboard/build.rs
+++ b/src/meta/dashboard/build.rs
@@ -55,7 +55,7 @@ fn build() -> anyhow::Result<()> {
 
     let dest = dest_dir();
     let src = Path::new(DASHBOARD_DIR).join("out");
-    dircpy::copy_dir(&src, &dest)?;
+    dircpy::copy_dir(src, dest)?;
 
     Ok(())
 }
diff --git a/src/meta/dashboard/src/lib.rs b/src/meta/dashboard/src/lib.rs
index 244e908c8738e..4414898ebc4ef 100644
--- a/src/meta/dashboard/src/lib.rs
+++ b/src/meta/dashboard/src/lib.rs
@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+#![allow(clippy::doc_markdown)]
+
 use axum::Router;
 
 mod embed;
diff --git a/src/meta/src/dashboard/mod.rs b/src/meta/src/dashboard/mod.rs
index 697f90e76703e..0eac865bb2d22 100644
--- a/src/meta/src/dashboard/mod.rs
+++ b/src/meta/src/dashboard/mod.rs
@@ -14,22 +14,18 @@
 
 mod prometheus;
 
-use std::collections::HashMap;
 use std::net::SocketAddr;
 use std::path::Path as FilePath;
 use std::sync::Arc;
 
 use anyhow::{anyhow, Result};
-use axum::body::{boxed, Body};
+use axum::body::boxed;
 use axum::extract::{Extension, Path};
 use axum::http::{Method, StatusCode};
 use axum::response::{IntoResponse, Response};
 use axum::routing::{get, get_service};
 use axum::Router;
-use hyper::Request;
-use parking_lot::Mutex;
 use risingwave_rpc_client::ComputeClientPool;
-use thiserror_ext::AsReport;
 use tower::{ServiceBuilder, ServiceExt};
 use tower_http::add_extension::AddExtensionLayer;
 use tower_http::compression::CompressionLayer;