[NFC][SYCL] Remove unused type traits (#15670)

Author: aelovikov-intel

sycl/include/sycl/detail/generic_type_traits.hpp

@@ -253,29 +253,6 @@ template <typename T> inline constexpr bool msbIsSet(const T x) {
   return (x & msbMask(x));
 }
 
-// Try to get vector element count or 1 otherwise
-template <typename T> struct GetNumElements {
-  static constexpr int value = 1;
-};
-template <typename Type, int NumElements>
-struct GetNumElements<typename sycl::vec<Type, NumElements>> {
-  static constexpr int value = NumElements;
-};
-
-// TryToGetElementType<T>::type is T::element_type or T::value_type if those
-// exist, otherwise T.
-template <typename T> class TryToGetElementType {
-  static T check(...);
-  template <typename A> static typename A::element_type check(const A &);
-  template <typename A, typename = std::enable_if_t<!std::is_same_v<
-                            typename A::element_type, typename A::value_type>>>
-  static typename A::value_type check(const A &);
-
-public:
-  using type = decltype(check(T()));
-  static constexpr bool value = !std::is_same_v<T, type>;
-};
-
 template <typename T> static constexpr T max_v() {
   return (std::numeric_limits<T>::max)();
 }

sycl/include/sycl/detail/type_traits.hpp

@@ -366,32 +366,6 @@ struct is_multi_ptr<multi_ptr<ElementType, Space, IsDecorated>>
 template <class T>
 inline constexpr bool is_multi_ptr_v = is_multi_ptr<T>::value;
 
-// is_non_legacy_multi_ptr
-template <typename T> struct is_non_legacy_multi_ptr : std::false_type {};
-
-template <typename ElementType, access::address_space Space>
-struct is_non_legacy_multi_ptr<
-    multi_ptr<ElementType, Space, access::decorated::yes>> : std::true_type {};
-
-template <typename ElementType, access::address_space Space>
-struct is_non_legacy_multi_ptr<
-    multi_ptr<ElementType, Space, access::decorated::no>> : std::true_type {};
-
-template <class T>
-inline constexpr bool is_non_legacy_multi_ptr_v =
-    is_non_legacy_multi_ptr<T>::value;
-
-// is_legacy_multi_ptr
-template <typename T> struct is_legacy_multi_ptr : std::false_type {};
-
-template <typename ElementType, access::address_space Space>
-struct is_legacy_multi_ptr<
-    multi_ptr<ElementType, Space, access::decorated::legacy>> : std::true_type {
-};
-
-template <class T>
-inline constexpr bool is_legacy_multi_ptr_v = is_legacy_multi_ptr<T>::value;
-
 // remove_pointer_t
 template <typename T> struct remove_pointer_impl {
   using type = T;