Core: Remove Core::GetWindowHandle

Finally, it's unused. Whoa.

Source/Core/Core/Core.cpp

@@ -138,11 +138,6 @@ void DisplayMessage(const std::string& message, int time_in_ms)
 	}
 }
 
-void *GetWindowHandle()
-{
-	return g_pWindowHandle;
-}
-
 bool IsRunning()
 {
 	return (GetState() != CORE_UNINITIALIZED) || g_bHwInit;

Source/Core/Core/Core.h

@@ -59,9 +59,6 @@ void SaveScreenShot();
 
 void Callback_WiimoteInterruptChannel(int _number, u16 _channelID, const void* _pData, u32 _Size);
 
-void* GetWindowHandle();
-
-
 // This displays messages in a user-visible way.
 void DisplayMessage(const std::string& message, int time_in_ms);
 

Source/Core/DolphinWX/Frame.cpp

@@ -2,14 +2,6 @@
 // Licensed under GPLv2
 // Refer to the license.txt file included.
 
-
-// CFrame is the main parent window. Inside CFrame there is an m_Panel that is
-// the parent for the rendering window (when we render to the main window). In
-// Windows the rendering window is created by giving CreateWindow()
-// m_Panel->GetHandle() as parent window and creating a new child window to
-// m_Panel. The new child window handle that is returned by CreateWindow() can
-// be accessed from Core::GetWindowHandle().
-
 #ifdef __APPLE__
 #include <Cocoa/Cocoa.h>
 #endif

Source/Core/DolphinWX/FrameTools.cpp

@@ -2,18 +2,6 @@
 // Licensed under GPLv2
 // Refer to the license.txt file included.
 
-
-/*
-1.1 Windows
-
-CFrame is the main parent window. Inside CFrame there is m_Panel which is the
-parent for the rendering window (when we render to the main window). In Windows
-the rendering window is created by giving CreateWindow() m_Panel->GetHandle()
-as parent window and creating a new child window to m_Panel. The new child
-window handle that is returned by CreateWindow() can be accessed from
-Core::GetWindowHandle().
-*/
-
 #include <cstdarg>
 #include <cstdio>
 #include <mutex>