fix nightly

src/lib.rs

@@ -20,7 +20,6 @@
 //! Otherwise, the crate will use `cpuid` at runtime to detect the
 //! running CPU's features, and enable the appropriate algorithm.
 
-#![cfg_attr(all(target_arch = "aarch64", nightly), feature(stdarch_arm_crc32))]
 
 mod combine;
 mod hasher;