drm/i915/gvt: remove the redundant info NULL check

The variable info is never NULL, which is checked by the caller. This
patch removes the redundant info NULL check logic.

Fixes: 695fbc08 ("drm/i915/gvt: replace the gvt_err with gvt_vgpu_err")
Signed-off-by: NTina Zhang <tina.zhang@intel.com>
Signed-off-by: NZhenyu Wang <zhenyuw@linux.intel.com>
(cherry picked from commit 865f03d4)
Signed-off-by: NJani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/gvt/kvmgt.c

@@ -1340,13 +1340,6 @@ static int kvmgt_guest_init(struct mdev_device *mdev)
 
 static bool kvmgt_guest_exit(struct kvmgt_guest_info *info)
 {
-	struct intel_vgpu *vgpu = info->vgpu;
-
-	if (!info) {
-		gvt_vgpu_err("kvmgt_guest_info invalid\n");
-		return false;
-	}
-
 	kvm_page_track_unregister_notifier(info->kvm, &info->track_node);
 	kvm_put_kvm(info->kvm);
 	kvmgt_protect_table_destroy(info);