Make w32_regex_traits.hpp header only.

test/Jamfile.v2

@@ -68,7 +68,6 @@ lib boost_regex_recursive :
    ../src/regex_raw_buffer.cpp
    ../src/regex_traits_defaults.cpp
    ../src/static_mutex.cpp
-   ../src/w32_regex_traits.cpp
    ../src/wide_posix_api.cpp
    ../build//icu_options
     : 

test/captures/Jamfile.v2

@@ -15,7 +15,6 @@ EX_SOURCES =
    regex_raw_buffer.cpp
    regex_traits_defaults.cpp
    static_mutex.cpp
-   w32_regex_traits.cpp
    wide_posix_api.cpp ;
        
 lib boost_regex_extra : $(EX_SOURCES) ../../build//icu_options

test/noeh_test/Jamfile.v2

@@ -31,7 +31,6 @@ lib boost_regex_noeh :
    ../../src/regex_raw_buffer.cpp
    ../../src/regex_traits_defaults.cpp
    ../../src/static_mutex.cpp
-   ../../src/w32_regex_traits.cpp
    ../../src/wide_posix_api.cpp
    ../../build//icu_options
     : 

test/test_consolidated.cpp

@@ -17,5 +17,4 @@
 #include <libs/regex/src/regex_raw_buffer.cpp>
 #include <libs/regex/src/regex_traits_defaults.cpp>
 #include <libs/regex/src/static_mutex.cpp>
-#include <libs/regex/src/w32_regex_traits.cpp>
 #include <libs/regex/src/wide_posix_api.cpp>