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

Author: starkat99

src/bfloat.rs

@@ -1,4 +1,5 @@
 #[cfg(all(feature = "serde", feature = "alloc"))]
+#[allow(unused_imports)]
 use alloc::string::ToString;
 #[cfg(feature = "bytemuck")]
 use bytemuck::{Pod, Zeroable};

src/binary16.rs

@@ -1,4 +1,5 @@
 #[cfg(all(feature = "serde", feature = "alloc"))]
+#[allow(unused_imports)]
 use alloc::string::ToString;
 #[cfg(feature = "bytemuck")]
 use bytemuck::{Pod, Zeroable};

src/slice.rs

@@ -9,6 +9,7 @@
 
 use crate::{bf16, binary16::arch, f16};
 #[cfg(feature = "alloc")]
+#[allow(unused_imports)]
 use alloc::vec::Vec;
 use core::slice;
 

src/vec.rs

@@ -11,6 +11,7 @@
 
 use super::{bf16, f16, slice::HalfFloatSliceExt};
 #[cfg(feature = "alloc")]
+#[allow(unused_imports)]
 use alloc::vec::Vec;
 use core::mem;