Remove dead code

Providers/OpenVRProviderContext.h

@@ -22,29 +22,3 @@ struct OpenVRProviderContext
 	OpenVRInputProvider *inputProvider;
 };
 
-inline OpenVRProviderContext &GetProviderContext( void *data )
-{
-	assert( data != NULL );
-	return *static_cast< OpenVRProviderContext * >( data );
-}
-
-class ProviderImpl
-{
-public:
-	ProviderImpl( OpenVRProviderContext &providerContext, UnitySubsystemHandle subsystemHandle )
-		: m_Context( providerContext )
-		, m_Handle( subsystemHandle )
-	{
-	}
-	virtual ~ProviderImpl() {}
-
-	virtual UnitySubsystemErrorCode Initialize() = 0;
-	virtual UnitySubsystemErrorCode Start() = 0;
-
-	virtual void Stop() = 0;
-	virtual void Shutdown() = 0;
-
-protected:
-	OpenVRProviderContext &m_Context;
-	UnitySubsystemHandle m_Handle;
-};