test: linter feedback

test/entt/core/hashed_string.cpp

@@ -1,5 +1,4 @@
 #include <cstdint>
-#include <string>
 #include <string_view>
 #include <gtest/gtest.h>
 #include <entt/core/hashed_string.hpp>

test/entt/core/ident.cpp

@@ -17,10 +17,13 @@ TEST(Ident, Uniqueness) {
 
     // test uses in constant expressions
     switch(id::value<test::boxed_int>) {
-    case id::value<test::empty>:
-        FAIL();
     case id::value<test::boxed_int>:
         SUCCEED();
+        break;
+    case id::value<test::empty>:
+    default:
+        FAIL();
+        break;
     }
 }
 

test/entt/entity/group.cpp

@@ -2,7 +2,6 @@
 #include <array>
 #include <cstddef>
 #include <functional>
-#include <iterator>
 #include <tuple>
 #include <type_traits>
 #include <utility>

test/entt/entity/sigh_mixin.cpp

@@ -1,6 +1,5 @@
 #include <array>
 #include <cstddef>
-#include <iterator>
 #include <memory>
 #include <type_traits>
 #include <utility>

test/entt/meta/meta_container.cpp

@@ -12,7 +12,6 @@
 #include <entt/container/dense_map.hpp>
 #include <entt/container/dense_set.hpp>
 #include <entt/meta/container.hpp>
-#include <entt/meta/factory.hpp>
 #include <entt/meta/meta.hpp>
 #include <entt/meta/resolve.hpp>
 

test/example/signal_less.cpp

@@ -1,7 +1,6 @@
 #include <array>
 #include <type_traits>
 #include <gtest/gtest.h>
-#include <entt/entity/entity.hpp>
 #include <entt/entity/mixin.hpp>
 #include <entt/entity/registry.hpp>
 #include <entt/entity/storage.hpp>