Remove unused code.

fpdfsdk/pdfwindow/PWL_Label.h

-// Copyright 2014 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#ifndef FPDFSDK_PDFWINDOW_PWL_LABEL_H_
-#define FPDFSDK_PDFWINDOW_PWL_LABEL_H_
-
-#include "fpdfsdk/pdfwindow/PWL_Wnd.h"
-
-class IFX_Edit;
-
-class CPWL_Label : public CPWL_Wnd {
- public:
-  CPWL_Label();
-  ~CPWL_Label() override;
-
-  void SetText(const FX_WCHAR* csText);
-  CFX_WideString GetText() const;
-  void SetLimitChar(int32_t nLimitChar);
-  void SetHorzScale(int32_t nHorzScale);
-  void SetCharSpace(FX_FLOAT fCharSpace);
-  CFX_FloatRect GetContentRect() const;
-  int32_t GetTotalWords();
-  CFX_ByteString GetTextAppearanceStream(const CFX_FloatPoint& ptOffset) const;
-
- protected:
-  // CPWL_Wnd
-  CFX_ByteString GetClassName() const override;
-  void SetFontSize(FX_FLOAT fFontSize) override;
-  FX_FLOAT GetFontSize() const override;
-  void OnCreated() override;
-  void DrawThisAppearance(CFX_RenderDevice* pDevice,
-                          CFX_Matrix* pUser2Device) override;
-  void GetThisAppearanceStream(CFX_ByteTextBuf& sAppStream) override;
-  void RePosChildWnd() override;
-
- private:
-  void SetParamByFlag();
-
-  IFX_Edit* m_pEdit;
-};
-
-#endif  // FPDFSDK_PDFWINDOW_PWL_LABEL_H_