Suppress unused macro warning

src/simd_opt/mod.rs

@@ -5,6 +5,7 @@
 // http://opensource.org/licenses/MIT>, at your option. This file may not be
 // copied, modified, or distributed except according to those terms.
 
+#![allow(unused_macros)]
 #![cfg_attr(feature = "cargo-clippy", allow(inline_always))]
 
 #[cfg(feature = "simd")]