fix cargo check

Author: XiangpengHao

datafusion/common/src/cast.rs

@@ -127,11 +127,6 @@ pub fn as_generic_binary_array<T: OffsetSizeTrait>(
     Ok(downcast_value!(array, GenericBinaryArray, T))
 }
 
-// Downcast ArrayRef to BinaryViewArray
-pub fn as_binary_view_array(array: &dyn Array) -> Result<&BinaryViewArray> {
-    Ok(downcast_value!(array, BinaryViewArray))
-}
-
 // Downcast ArrayRef to GenericListArray
 pub fn as_generic_list_array<T: OffsetSizeTrait>(
     array: &dyn Array,