[PATCH] don't export vma_prio_tree_next

From: Christoph Hellwig <hch@lst.de>

there's no user is modules, the function isn't in mainline and I don't see why
modules should use it.

mm/prio_tree.c

@@ -661,4 +661,3 @@ struct vm_area_struct *vma_prio_tree_next(struct vm_area_struct *vma,
 	} else
 		return NULL;
 }
-EXPORT_SYMBOL(vma_prio_tree_next);