diff --git a/emp-tool/src/aes.rs b/emp-tool/src/aes.rs
index 327ef77..5ec6389 100644
--- a/emp-tool/src/aes.rs
+++ b/emp-tool/src/aes.rs
@@ -65,8 +65,6 @@ macro_rules! expand_assist_arm {
 }
 
 impl Aes {
-    // /// The AES_BLOCK_SIZE.
-    // pub const AES_BLOCK_SIZE: usize = 8;
 
     /// New an AES instance
     #[inline(always)]