removed defunct BOOST_DECL macro

[SVN r16257]

test/config_info.cpp

@@ -837,7 +837,6 @@ void print_boost_macros()
    PRINT_MACRO(BOOST_NO_PLATFORM_CONFIG);
    // then defect and feature macros:
    PRINT_MACRO(BOOST_BCB_PARTIAL_SPECIALIZATION_BUG);
-   PRINT_MACRO(BOOST_DECL);
    PRINT_MACRO(BOOST_DEDUCED_TYPENAME);
    PRINT_MACRO(BOOST_DISABLE_THREADS);
    PRINT_MACRO(BOOST_DISABLE_WIN32);