chore: remove useless class

Author: ShrBox

src/legacy/api/EntityAPI.h

@@ -115,4 +115,3 @@ class EntityClass : public ScriptClass {
     Local<Value> removeEffect(const Arguments& args);
 };
 extern ClassDefine<EntityClass> EntityClassBuilder;
-extern ClassDefine<void>        ActorDamageCauseBuilder;

src/legacy/main/BindAPIs.cpp

@@ -57,7 +57,6 @@ void BindAPIs(ScriptEngine* engine) {
     engine->registerNativeClass(NbtStaticBuilder);
     engine->registerNativeClass(TextClassBuilder);
     engine->registerNativeClass(ParticleColorBuilder);
-    engine->registerNativeClass(ActorDamageCauseBuilder);
 
     engine->registerNativeClass(PermissionStaticBuilder);
     engine->registerNativeClass(ParamTypeStaticBuilder);