Fix building with no-std

Author: Kerollmops

src/bitmap/mod.rs

@@ -12,6 +12,7 @@ mod cmp;
 mod inherent;
 mod iter;
 mod ops;
+#[cfg(feature = "std")]
 mod ops_with_serialized;
 #[cfg(feature = "serde")]
 mod serde;

src/bitmap/ops_with_serialized.rs

@@ -1,10 +1,10 @@
 use bytemuck::cast_slice_mut;
 use byteorder::{LittleEndian, ReadBytesExt};
 use core::convert::Infallible;
-use core::mem;
-use core::ops::RangeInclusive;
 use std::error::Error;
 use std::io::{self, SeekFrom};
+use std::mem;
+use std::ops::RangeInclusive;
 
 use crate::bitmap::container::Container;
 use crate::bitmap::serialization::{
@@ -13,9 +13,6 @@ use crate::bitmap::serialization::{
 };
 use crate::RoaringBitmap;
 
-#[cfg(not(feature = "std"))]
-use alloc::vec::Vec;
-
 use super::container::ARRAY_LIMIT;
 use super::store::{ArrayStore, BitmapStore, Store, BITMAP_LENGTH};