Merge pull request #1947 from folkertdev/remove-size_of-intrinsic-use

remove a use of `core::intrinsics::size_of`

Author: folkertdev

crates/core_arch/src/x86/gfni.rs

@@ -745,7 +745,6 @@ mod tests {
     #![allow(overflowing_literals)]
 
     use core::hint::black_box;
-    use core::intrinsics::size_of;
     use stdarch_test::simd_test;
 
     use crate::core_arch::x86::*;