build: remove entt library

include/entt/process/fwd.hpp

@@ -1,23 +0,0 @@
-#ifndef ENTT_PROCESS_FWD_HPP
-#define ENTT_PROCESS_FWD_HPP
-
-#include "../stl/cstdint.hpp"
-#include "../stl/memory.hpp"
-
-namespace entt {
-
-template<typename, typename = stl::allocator<void>>
-class basic_process;
-
-/*! @brief Alias declaration for the most common use case. */
-using process = basic_process<stl::uint32_t>;
-
-template<typename, typename = stl::allocator<void>>
-class basic_scheduler;
-
-/*! @brief Alias declaration for the most common use case. */
-using scheduler = basic_scheduler<stl::uint32_t>;
-
-} // namespace entt
-
-#endif