[test] Remove unused common routines.

- Remove used common routines, which variadic functions, not supported
  feature, are used.


[ROCm/hip commit: 16a27e06ee]

projects/hip/tests/src/deviceLib/vector_test_common.h

@@ -25,45 +25,3 @@ THE SOFTWARE.
 
 template<bool b, typename T = void>
 using Enable_if_t = typename std::enable_if<b, T>::type;
-
-__host__ __device__
-std::false_type is_vec4(...);
-__host__ __device__
-std::false_type is_vec3(...);
-__host__ __device__
-std::false_type is_vec2(...);
-__host__ __device__
-std::false_type is_vec1(...);
-
-template<typename T>
-__host__ __device__
-auto is_vec4(const T&) -> decltype(std::declval<T>().xyzw, std::true_type{});
-template<
-    typename T, Enable_if_t<decltype(!is_vec4(std::declval<T>())){}>* = nullptr>
-__host__ __device__
-auto is_vec3(const T&) -> decltype(std::declval<T>().xyz, std::true_type{});
-template<
-    typename T,
-    Enable_if_t<
-        !decltype(is_vec4(std::declval<T>())){} &&
-        !decltype(is_vec3(std::declval<T>())){}>* = nullptr>
-__host__ __device__
-auto is_vec2(const T&) -> decltype(std::declval<T>().xy, std::true_type{});
-template<
-    typename T,
-    Enable_if_t<
-        !decltype(is_vec4(std::declval<T>())){} &&
-        !decltype(is_vec3(std::declval<T>())){} &&
-        !decltype(is_vec2(std::declval<T>())){}>* = nullptr>
-__host__ __device__
-auto is_vec1(const T&) -> decltype(std::declval<T>().x, std::true_type{});
-
-template<typename T, int dimension>
-__host__ __device__
-constexpr
-bool is_vec() {
-    return (dimension == 1) ? decltype(is_vec1(std::declval<T>())){} :
-        ((dimension == 2) ? decltype(is_vec2(std::declval<T>())){} :
-        ((dimension == 3) ? decltype(is_vec3(std::declval<T>())){} :
-            decltype(is_vec4(std::declval<T>())){}));
-}