--- a/rust/chg/build.rs	Thu Apr 09 16:06:03 2020 +0530
+++ b/rust/chg/build.rs	Fri Apr 10 21:35:16 2020 +0900
@@ -1,5 +1,3 @@
-extern crate cc;
-
 fn main() {
     cc::Build::new()
         .warnings(true)