diff --git a/src/mito2/src/cache/write_cache.rs b/src/mito2/src/cache/write_cache.rs
index 8a431f22a63d..fc9972de5305 100644
--- a/src/mito2/src/cache/write_cache.rs
+++ b/src/mito2/src/cache/write_cache.rs
@@ -20,7 +20,6 @@ use std::time::Duration;
 use common_base::readable_size::ReadableSize;
 use common_telemetry::{debug, info};
 use futures::AsyncWriteExt;
-use object_store::manager::ObjectStoreManagerRef;
 use object_store::ObjectStore;
 use snafu::ResultExt;
 
@@ -44,10 +43,6 @@ use crate::sst::{DEFAULT_WRITE_BUFFER_SIZE, DEFAULT_WRITE_CONCURRENCY};
 pub struct WriteCache {
     /// Local file cache.
     file_cache: FileCacheRef,
-    /// Object store manager.
-    #[allow(unused)]
-    /// TODO: Remove unused after implementing async write cache
-    object_store_manager: ObjectStoreManagerRef,
     /// Puffin manager factory for index.
     puffin_manager_factory: PuffinManagerFactory,
     /// Intermediate manager for index.
@@ -61,7 +56,6 @@ impl WriteCache {
     /// `object_store_manager` for all object stores.
     pub async fn new(
         local_store: ObjectStore,
-        object_store_manager: ObjectStoreManagerRef,
         cache_capacity: ReadableSize,
         ttl: Option<Duration>,
         puffin_manager_factory: PuffinManagerFactory,
@@ -72,7 +66,6 @@ impl WriteCache {
 
         Ok(Self {
             file_cache,
-            object_store_manager,
             puffin_manager_factory,
             intermediate_manager,
         })
@@ -81,7 +74,6 @@ impl WriteCache {
     /// Creates a write cache based on local fs.
     pub async fn new_fs(
         cache_dir: &str,
-        object_store_manager: ObjectStoreManagerRef,
         cache_capacity: ReadableSize,
         ttl: Option<Duration>,
         puffin_manager_factory: PuffinManagerFactory,
@@ -92,7 +84,6 @@ impl WriteCache {
         let local_store = new_fs_cache_store(cache_dir).await?;
         Self::new(
             local_store,
-            object_store_manager,
             cache_capacity,
             ttl,
             puffin_manager_factory,
diff --git a/src/mito2/src/test_util.rs b/src/mito2/src/test_util.rs
index 314e886ba9ca..14b4bb4a9109 100644
--- a/src/mito2/src/test_util.rs
+++ b/src/mito2/src/test_util.rs
@@ -644,16 +644,9 @@ impl TestEnv {
             .unwrap();
 
         let object_store_manager = self.get_object_store_manager().unwrap();
-        let write_cache = WriteCache::new(
-            local_store,
-            object_store_manager,
-            capacity,
-            None,
-            puffin_mgr,
-            intm_mgr,
-        )
-        .await
-        .unwrap();
+        let write_cache = WriteCache::new(local_store, capacity, None, puffin_mgr, intm_mgr)
+            .await
+            .unwrap();
 
         Arc::new(write_cache)
     }
diff --git a/src/mito2/src/worker.rs b/src/mito2/src/worker.rs
index 233ab9f056b1..62ad59f0701a 100644
--- a/src/mito2/src/worker.rs
+++ b/src/mito2/src/worker.rs
@@ -157,7 +157,6 @@ impl WorkerGroup {
         let purge_scheduler = Arc::new(LocalScheduler::new(config.max_background_purges));
         let write_cache = write_cache_from_config(
             &config,
-            object_store_manager.clone(),
             puffin_manager_factory.clone(),
             intermediate_manager.clone(),
         )
@@ -303,7 +302,6 @@ impl WorkerGroup {
             .with_buffer_size(Some(config.index.write_buffer_size.as_bytes() as _));
         let write_cache = write_cache_from_config(
             &config,
-            object_store_manager.clone(),
             puffin_manager_factory.clone(),
             intermediate_manager.clone(),
         )
@@ -364,7 +362,6 @@ fn region_id_to_index(id: RegionId, num_workers: usize) -> usize {
 
 async fn write_cache_from_config(
     config: &MitoConfig,
-    object_store_manager: ObjectStoreManagerRef,
     puffin_manager_factory: PuffinManagerFactory,
     intermediate_manager: IntermediateManager,
 ) -> Result<Option<WriteCacheRef>> {
@@ -383,7 +380,6 @@ async fn write_cache_from_config(
 
     let cache = WriteCache::new_fs(
         &config.experimental_write_cache_path,
-        object_store_manager,
         config.experimental_write_cache_size,
         config.experimental_write_cache_ttl,
         puffin_manager_factory,