diff --git a/launcher/src/main.rs b/launcher/src/main.rs
index f4c11211..c03af4b7 100644
--- a/launcher/src/main.rs
+++ b/launcher/src/main.rs
@@ -369,12 +369,6 @@ fn shard_manager(
     // Copy current process env
     let mut envs: Vec<(OsString, OsString)> = env::vars_os().collect();
 
-    // Use cuda allocator. It leads to less memory fragmentation
-    // envs.push((
-    //     "PYTORCH_CUDA_ALLOC_CONF".into(),
-    //     "backend:cudaMallocAsync".into(),
-    // ));
-
     // Torch Distributed Env vars
     envs.push(("RANK".into(), rank.to_string().into()));
     envs.push(("WORLD_SIZE".into(), world_size.to_string().into()));