WrapperGenerator: Don't emit code for imported enumerations

Author: https://github.com/alimpfard
Commit: 144ef3eb9f
Pull-request: https://github.com/SerenityOS/serenity/pull/12590

Meta/Lagom/Tools/CodeGenerators/LibWeb/WrapperGenerator/IDLGenerators.cpp

@@ -1408,6 +1408,8 @@ private:
 )~~~");
 
     for (auto& it : interface.enumerations) {
+        if (!it.value.is_original_definition)
+            continue;
         auto enum_generator = generator.fork();
         enum_generator.set("enum.type.name", it.key);
         enum_generator.append(R"~~~(