merged disk buffer pool change from RC_0_16

include/libtorrent/disk_buffer_pool.hpp

@@ -38,10 +38,6 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/session_settings.hpp"
 #include "libtorrent/allocator.hpp"
 
-#ifndef TORRENT_DISABLE_POOL_ALLOCATOR
-#include <boost/pool/pool.hpp>
-#endif
-
 #ifdef TORRENT_DISK_STATS
 #include <fstream>
 #endif
@@ -101,12 +97,6 @@ namespace libtorrent
 
 		mutable mutex m_pool_mutex;
 
-#ifndef TORRENT_DISABLE_POOL_ALLOCATOR
-		// memory pool for read and write operations
-		// and disk cache
-		boost::pool<page_aligned_allocator> m_pool;
-#endif
-
 #if defined TORRENT_DISK_STATS || defined TORRENT_STATS
 		int m_allocations;
 #endif