dm: remove unneeded kvfree from alloc_targets

alloc_targets() is always called with a newly initialized table where
t->highs == NULL.

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>

drivers/md/dm-table.c

@@ -117,7 +117,6 @@ static int alloc_targets(struct dm_table *t, unsigned int num)
 	n_targets = (struct dm_target *) (n_highs + num);
 
 	memset(n_highs, -1, sizeof(*n_highs) * num);
-	kvfree(t->highs);
 
 	t->num_allocated = num;
 	t->highs = n_highs;