Fix dead_code

Author: JustForFun88

src/raw/mod.rs

@@ -1456,6 +1456,7 @@ impl<T, A: Allocator + Clone> RawTable<T, A> {
     /// Because we cannot make the `next` method unsafe on the `RawIterRange`
     /// struct, we have to make the `raw_iter_range` method unsafe.
     #[inline]
+    #[allow(dead_code)]
     pub(crate) unsafe fn raw_iter_range(&self) -> RawIterRange<T> {
         let data = Bucket::from_base_index(self.data_end(), 0);
         RawIterRange::new(self.table.ctrl.as_ptr(), data, self.table.buckets())