Update cub/test/catch2_test_device_scan_by_key_custom_policy_hub.cu

Co-authored-by: Michael Schellenberger Costa <[email protected]>

Author: bernhardmgruber

cub/test/catch2_test_device_scan_by_key_custom_policy_hub.cu

@@ -38,9 +38,9 @@ C2H_TEST("DispatchScanByKey::Dispatch: custom policy hub", "[scan_by_key][device
   using key_t     = int;
   using value_t   = int;
   using offset_t  = unsigned int;
-  using scan_op_t = ::cuda::std::plus<>;
-  using eq_op_t   = ::cuda::std::equal_to<>;
-  using accum_t   = ::cuda::std::__accumulator_t<scan_op_t, value_t, value_t>;
+  using scan_op_t = cuda::std::plus<>;
+  using eq_op_t   = cuda::std::equal_to<>;
+  using accum_t   = cuda::std::__accumulator_t<scan_op_t, value_t, value_t>;
 
   c2h::device_vector<key_t> d_keys{1, 1, 23, 2, 2, 1, 35, 2, 4, 67, 8, 2, 6, 8, 434, 6, 8};
   c2h::device_vector<value_t> d_values{3, 4, 1, 2, 3, 5, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12};