Remove old pool allocator.

	* alloc-pool.c (create_alloc_pool): Remove.
	(empty_alloc_pool): Likewise.
	(free_alloc_pool): Likewise.
	(free_alloc_pool_if_empty): Likewise.
	(pool_alloc): Likewise.
	(pool_free): Likewise.
	* alloc-pool.h: Remove old declarations.

From-SVN: r223973