Fix "namespace uses itself"
iterator_category_to_traversal.h(36): warning C4515: 'detail':
namespace uses itself
No need to bring the `thrust::detail` namespace into `thrust::detail`.
MODIFY
thrust/iterator/detail/iterator_category_to_traversal.h
thrust/iterator/detail/iterator_category_to_traversal.h
@@ -32,9 +32,6 @@ namespace detail
template <typename> struct is_iterator_system;
template <typename> struct is_iterator_traversal;
-// make type_traits easy to access
-using namespace thrust::detail;
-
template <typename Category>
struct host_system_category_to_traversal
: eval_if<

Fix "namespace uses itself"

iterator_category_to_traversal.h(36): warning C4515: 'detail':
  namespace uses itself

No need to bring the `thrust::detail` namespace into `thrust::detail`.