vfio/iommu_type1: Remove unused pinned_page_dirty_scope in vfio_iommu

pinned_page_dirty_scope is optimized out by commit 0103215
("vfio/iommu_type1: Mantain a counter for non_pinned_groups"),
but appears again due to some issues during merging branches.
We can safely remove it here.

Signed-off-by: Keqian Zhu <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Alex Williamson <[email protected]>

Author: Keqian Zhu

drivers/vfio/vfio_iommu_type1.c

@@ -77,7 +77,6 @@ struct vfio_iommu {
 	bool			v2;
 	bool			nesting;
 	bool			dirty_page_tracking;
-	bool			pinned_page_dirty_scope;
 	bool			container_open;
 };