The iommu group changes notifer is not referenced in the tree. Remove it
to avoid dead code.
Suggested-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NLu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: NJason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20220418005000.897664-12-baolu.lu@linux.intel.comSigned-off-by: NJoerg Roedel <jroedel@suse.de>