92d205672a
`fir.unbox` operation is an old operation that is no longer required. There are couple of other operations that can be used to extract information from a `fir.box` such as `fir.box_rank`, `fir.box_addr`, `fir.box_dims`. This was found during the upstreaming process. Reviewed By: awarzynski Differential Revision: https://reviews.llvm.org/D113581