build: remove entt library

include/entt/core/ident.hpp

@@ -1,35 +0,0 @@
-#ifndef ENTT_CORE_IDENT_HPP
-#define ENTT_CORE_IDENT_HPP
-
-#include "../stl/cstddef.hpp"
-#include "../stl/type_traits.hpp"
-#include "../stl/utility.hpp"
-#include "fwd.hpp"
-#include "type_traits.hpp"
-
-namespace entt {
-
-/**
- * @brief Type integral identifiers.
- * @tparam Type List of types for which to generate identifiers.
- */
-template<typename... Type>
-class ident {
-    template<typename Curr, stl::size_t... Index>
-    [[nodiscard]] static ENTT_CONSTEVAL id_type get(stl::index_sequence<Index...>) noexcept {
-        return (0 + ... + (stl::is_same_v<Curr, type_list_element_t<Index, type_list<stl::decay_t<Type>...>>> ? id_type{Index} : id_type{}));
-    }
-
-public:
-    /*! @brief Unsigned integer type. */
-    using value_type = id_type;
-
-    /*! @brief Statically generated unique identifier for the given type. */
-    template<typename Curr>
-    requires (stl::is_same_v<stl::remove_cvref_t<Curr>, Type> || ...)
-    static constexpr value_type value = get<stl::remove_cvref_t<Curr>>(stl::index_sequence_for<Type...>{});
-};
-
-} // namespace entt
-
-#endif