[portable-simd] Fix doc test failure

Author: dpaoliello

library/portable-simd/crates/core_simd/src/vector.rs

@@ -325,7 +325,7 @@ where
     /// # #![feature(portable_simd)]
     /// # #[cfg(feature = "as_crate")] use core_simd::simd;
     /// # #[cfg(not(feature = "as_crate"))] use core::simd;
-    /// # use simd::{Simd, Mask};
+    /// # use simd::Simd;
     /// let vec: Vec<i32> = vec![10, 11];
     ///
     /// let result = Simd::<i32, 4>::load_or_default(&vec);
@@ -348,7 +348,7 @@ where
     /// # #![feature(portable_simd)]
     /// # #[cfg(feature = "as_crate")] use core_simd::simd;
     /// # #[cfg(not(feature = "as_crate"))] use core::simd;
-    /// # use simd::{Simd, Mask};
+    /// # use simd::Simd;
     /// let vec: Vec<i32> = vec![10, 11];
     /// let or = Simd::from_array([-5, -4, -3, -2]);
     ///