Removed Initialize function for systems.

include/Engine/Core/System.h

@@ -15,7 +15,6 @@ public:
         , m_ComponentType(componentType)
     { }
 	
-	virtual void Initialize() { }
     virtual void Update(World* world, ComponentWrapper& component, double dt) = 0;
 
 protected:

include/Engine/Core/SystemPipeline.h

@@ -21,16 +21,6 @@ public:
         }
     }
 
-	void Initialize()
-	{
-		for (auto& pair : m_Systems) {
-			auto& systems = pair.second;
-			for (auto& system : systems) {
-				system->Initialize();
-			}
-		}
-	}
-
     template <typename T, typename... Arguments>
     void AddSystem(Arguments... args)
     {

include/Game/PlayerSystem.h

@@ -23,9 +23,11 @@ class PlayerSystem : public System
 public:
 	PlayerSystem(EventBroker* eventBroker)
 		: System(eventBroker, "Player")
-	{ }
+	{ 
+		EVENT_SUBSCRIBE_MEMBER(m_EKeyDown, &PlayerSystem::OnKeyDown);
+		EVENT_SUBSCRIBE_MEMBER(m_EKeyUp, &PlayerSystem::OnKeyUp);
+	}
 
-	virtual void Initialize();
 	virtual void Update(World* world, ComponentWrapper& player, double dt) override;
 
 private: