remove some last lexical_cast residual

bindings/python/src/torrent_handle.cpp

@@ -13,7 +13,6 @@
 #include "libtorrent/announce_entry.hpp"
 #include <libtorrent/storage.hpp>
 #include <libtorrent/file_pool.hpp>
-#include <boost/lexical_cast.hpp>
 #include "gil.hpp"
 
 using namespace boost::python;

docs/building.rst

@@ -410,7 +410,7 @@ unix/linux systems comes with these preinstalled.
 The prerequisites for building libtorrent are boost.system, boost.chrono and
 boost.random. Those are the *compiled* boost libraries needed. The headers-only
 libraries needed include (but is not necessarily limited to) boost.bind,
-boost.ref, boost.multi_index, boost.optional, boost.lexical_cast, boost.integer,
+boost.ref, boost.multi_index, boost.optional, boost.integer,
 boost.iterator, boost.tuple, boost.array, boost.function, boost.smart_ptr,
 boost.preprocessor, boost.static_assert.
 

src/string_util.cpp

@@ -48,8 +48,7 @@ POSSIBILITY OF SUCH DAMAGE.
 namespace libtorrent
 {
 
-	// lexical_cast's result depends on the locale. We need
-	// a well defined result
+	// We need well defined results that don't depend on locale
 	boost::array<char, 4 + std::numeric_limits<boost::int64_t>::digits10>
 		to_string(boost::int64_t n)
 	{

test/bdecode_benchmark.cpp

@@ -34,7 +34,6 @@ POSSIBILITY OF SUCH DAMAGE.
 #include "libtorrent/bdecode.hpp"
 #include "libtorrent/bencode.hpp"
 #include "libtorrent/sha1_hash.hpp"
-#include <boost/lexical_cast.hpp>
 #include <iostream>
 
 #include "test.hpp"