build: remove entt library

include/entt/meta/template.hpp

@@ -1,29 +0,0 @@
-// IWYU pragma: always_keep
-
-#ifndef ENTT_META_TEMPLATE_HPP
-#define ENTT_META_TEMPLATE_HPP
-
-#include "../core/type_traits.hpp"
-
-namespace entt {
-
-/*! @brief Utility class to disambiguate class templates. */
-template<template<typename...> class>
-struct meta_class_template_tag {};
-
-/**
- * @brief General purpose traits class for generating meta template information.
- * @tparam Clazz Type of class template.
- * @tparam Args Types of template arguments.
- */
-template<template<typename...> class Clazz, typename... Args>
-struct meta_template_traits<Clazz<Args...>> {
-    /*! @brief Wrapped class template. */
-    using class_type = meta_class_template_tag<Clazz>;
-    /*! @brief List of template arguments. */
-    using args_type = type_list<Args...>;
-};
-
-} // namespace entt
-
-#endif