Cleanup xfa_document_datamerge files

xfa/fxfa/parser/xfa_document_datadescription_imp.h

Index: xfa/fxfa/parser/xfa_document_datadescription_imp.h
diff --git a/xfa/fxfa/parser/xfa_document_datadescription_imp.h b/xfa/fxfa/parser/xfa_document_datadescription_imp.h
deleted file mode 100644
index f0c905c85db675f67ca650857608038919120339..0000000000000000000000000000000000000000
--- a/xfa/fxfa/parser/xfa_document_datadescription_imp.h
+++ /dev/null
@@ -1,18 +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_FXFA_PARSER_XFA_DOCUMENT_DATADESCRIPTION_IMP_H_
-#define XFA_FXFA_PARSER_XFA_DOCUMENT_DATADESCRIPTION_IMP_H_
-
-void XFA_DataDescription_UpdateDataRelation(CXFA_Node* pDataNode,
-                                            CXFA_Node* pDataDescriptionNode);
-CXFA_Node* XFA_DataDescription_MaybeCreateDataNode(
-    CXFA_Document* pDocument,
-    CXFA_Node* pDataParent,
-    XFA_Element eNodeType,
-    const CFX_WideString& wsName);
-
-#endif  // XFA_FXFA_PARSER_XFA_DOCUMENT_DATADESCRIPTION_IMP_H_