RDMA/irdma: Remove the redundant return

The type of the function i40iw_remove is void. So remove
the unnecessary return.

Link: https://lore.kernel.org/r/20220110073733.3221379-1-yanjun.zhu@linux.dev


Signed-off-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Acked-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>