cleanup headers

src/entt/entity/registry.hpp

@@ -12,7 +12,6 @@
 #include <tuple>
 #include <type_traits>
 #include <utility>
-#include <vector>
 #include "../config/config.h"
 #include "../container/dense_map.hpp"
 #include "../core/algorithm.hpp"

src/entt/entity/snapshot.hpp

@@ -7,7 +7,6 @@
 #include <tuple>
 #include <type_traits>
 #include <utility>
-#include <vector>
 #include "../config/config.h"
 #include "../container/dense_map.hpp"
 #include "../core/type_traits.hpp"

test/entt/entity/organizer.cpp

@@ -1,7 +1,6 @@
 #include <array>
 #include <cstddef>
 #include <utility>
-#include <vector>
 #include <gtest/gtest.h>
 #include <entt/core/type_info.hpp>
 #include <entt/entity/group.hpp>