Cleanup IFWL_Adapter interfaces.

xfa/fwl/core/ifwl_adapterthreadmgr.h

Index: xfa/fwl/core/ifwl_adapterthreadmgr.h
diff --git a/xfa/fwl/core/ifwl_adapterthreadmgr.h b/xfa/fwl/core/ifwl_adapterthreadmgr.h
deleted file mode 100644
index de2616a0af31948b0ba264eee66577f1a1384c70..0000000000000000000000000000000000000000
--- a/xfa/fwl/core/ifwl_adapterthreadmgr.h
+++ /dev/null
@@ -1,22 +0,0 @@
-// 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 XFA_FWL_CORE_IFWL_ADAPTERTHREADMGR_H_
-#define XFA_FWL_CORE_IFWL_ADAPTERTHREADMGR_H_
-
-#include "core/fxcrt/include/fx_system.h"
-#include "xfa/fwl/core/fwl_error.h"
-
-class IFWL_App;
-
-class IFWL_AdapterThreadMgr {
- public:
-  virtual ~IFWL_AdapterThreadMgr() {}
-
-  virtual IFWL_App* GetCurrentThread() = 0;
-};
-
-#endif  // XFA_FWL_CORE_IFWL_ADAPTERTHREADMGR_H_