vfio-common.h: Remove inaccurate comment

This is a left-over from "f4ec5e26 vfio: Add host side DMA window
capabilities", which added support to more than one DMA window.
Signed-off-by: NFabiano Rosas <farosas@linux.ibm.com>
Acked-by: NDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: NAlex Williamson <alex.williamson@redhat.com>

include/hw/vfio/vfio-common.h

@@ -74,11 +74,6 @@ typedef struct VFIOContainer {
     int error;
     bool initialized;
     unsigned long pgsizes;
-    /*
-     * This assumes the host IOMMU can support only a single
-     * contiguous IOVA window.  We may need to generalize that in
-     * future
-     */
     QLIST_HEAD(, VFIOGuestIOMMU) giommu_list;
     QLIST_HEAD(, VFIOHostDMAWindow) hostwin_list;
     QLIST_HEAD(, VFIOGroup) group_list;