Remove unused header detail/sp_interlocked.hpp

Author: pdimov

include/boost/smart_ptr/detail/sp_interlocked.hpp

@@ -117,7 +117,6 @@ run shared_ptr_alloc11_test.cpp ;
 run shared_ptr_alloc_construct11_test.cpp ;
 run allocate_shared_alloc11_test.cpp ;
 run allocate_shared_construct11_test.cpp ;
-run sp_interlocked_test.cpp ;
 
 compile-fail array_fail_spa_sp_c.cpp ;
 compile-fail array_fail_sp_spa_c.cpp ;