remove redundant rust mod

PeterAlfredLee · PeterAlfredLee · commit f8afa941d39d · 2022-06-13T15:31:36.000+08:00
diff --git a/rust/rabbit/src/lib.rs b/rust/rabbit/src/lib.rs
@@ -1,5 +1,3 @@
-mod utils;
-
 use wasm_bindgen::prelude::*;
 
 #[wasm_bindgen]
diff --git a/rust/rc4/src/lib.rs b/rust/rc4/src/lib.rs
@@ -1,5 +1,3 @@
-mod utils;
-
 use wasm_bindgen::prelude::*;
 
 #[wasm_bindgen]
