Fixes unused imports

Author: akern40

src/alias_asref.rs

@@ -4,12 +4,10 @@ use crate::{
     Axis,
     AxisDescription,
     Dimension,
-    LayoutRef,
     NdIndex,
     RawArrayView,
     RawData,
     RawDataMut,
-    RawRef,
     Slice,
     SliceArg,
 };

src/impl_owned_array.rs

@@ -13,7 +13,6 @@ use crate::dimension;
 use crate::error::{ErrorKind, ShapeError};
 use crate::iterators::Baseiter;
 use crate::low_level_util::AbortIfPanic;
-use crate::LayoutRef;
 use crate::OwnedRepr;
 use crate::Zip;