Remove unused headers

apps/openmw/mwgui/myguiplatform.hpp

@@ -2,9 +2,6 @@
 #define OPENMW_MWGUI_MYGUIPLATFORM_H
 
 #include "MyGUI_Prerequest.h"
-#include "MyGUI_DummyRenderManager.h"
-#include "MyGUI_DummyDataManager.h"
-#include "MyGUI_DummyDiagnostic.h"
 #include "MyGUI_LogManager.h"
 
 #include "myguirendermanager.hpp"
@@ -36,7 +33,7 @@ namespace MWGui
             mLogManager = nullptr;
         }
 
-        void initialise(const std::string& resourcePath, const std::string& _logName = MYGUI_PLATFORM_LOG_FILENAME)
+        void initialise(const std::string& resourcePath, const std::string& _logName = "MyGUI.log")
         {
             if (!_logName.empty())
                 MyGUI::LogManager::getInstance().createDefaultSource(_logName);

apps/openmw/mwgui/myguirendermanager.cpp

@@ -476,6 +476,10 @@ void RenderManager::initialise()
     mIsInitialise = true;
 }
 
+void RenderManager::shutdown()
+{
+}
+
 MyGUI::IVertexBuffer* RenderManager::createVertexBuffer()
 {
     return new OSGVertexBuffer();

apps/openmw/mwgui/myguirendermanager.hpp

@@ -53,6 +53,7 @@ public:
     virtual ~RenderManager();
 
     void initialise();
+    void shutdown();
 
     static RenderManager& getInstance() { return *getInstancePtr(); }
     static RenderManager* getInstancePtr()