allow redundant alloc import warnings due to new alloc prelude in nightly

Author: starkat99

src/vec.rs

@@ -102,6 +102,7 @@ pub trait HalfBitsVecExt: private::SealedHalfBitsVec {
 mod private {
     use crate::{bf16, f16};
     #[cfg(feature = "alloc")]
+    #[allow(unused_imports)]
     use alloc::vec::Vec;
 
     pub trait SealedHalfFloatVec {}