删除event不必要的代码

librf/src/event_v2.cpp

 		event_t::~event_t()
 		{
 		}
-
-		event_t::timeout_awaiter event_t::wait_until_(const clock_type::time_point& tp) const noexcept
-		{
-			return { tp, _event.get() };
-		}
 	}
 }

librf/src/event_v2.h

 			event_t& operator = (const event_t&) = default;
 			event_t& operator = (event_t&&) = default;
 		private:
-			//friend struct any_awaiter;
-
 			event_impl_ptr _event;
-
-			timeout_awaiter wait_until_(const clock_type::time_point& tp) const noexcept;
-			inline static bool is_all_succeeded(const std::vector<bool>& v)
-			{
-				return std::none_of(std::begin(v), std::end(v), [](auto v) 
-					{
-						return v == false;
-					});
-			}
 		};
 	}
 }

librf/src/event_v2.inl

 		template<class _Rep, class _Period>
 		inline event_t::timeout_awaiter event_t::wait_for(const std::chrono::duration<_Rep, _Period>& dt) const noexcept
 		{
-			return wait_until_(clock_type::now() + std::chrono::duration_cast<clock_type::duration>(dt));
+			clock_type::time_point tp2 = clock_type::now() + std::chrono::duration_cast<clock_type::duration>(dt);
+			return { tp2, _event.get() };
 		}
 
 		template<class _Clock, class _Duration>
 		inline event_t::timeout_awaiter event_t::wait_until(const std::chrono::time_point<_Clock, _Duration>& tp) const noexcept
 		{
-			return wait_until_(std::chrono::time_point_cast<clock_type::duration>(tp));
+			clock_type::time_point tp2 = std::chrono::time_point_cast<clock_type::duration>(tp);
+			return { tp2, _event.get() };
 		}