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diff --git a/Build/source/libs/poppler/poppler-src/poppler/Lexer.h b/Build/source/libs/poppler/poppler-src/poppler/Lexer.h
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index eb692a5c248..00000000000
--- a/Build/source/libs/poppler/poppler-src/poppler/Lexer.h
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@@ -1,112 +0,0 @@
-//========================================================================
-//
-// Lexer.h
-//
-// Copyright 1996-2003 Glyph & Cog, LLC
-//
-//========================================================================
-
-//========================================================================
-//
-// Modified under the Poppler project - http://poppler.freedesktop.org
-//
-// All changes made under the Poppler project to this file are licensed
-// under GPL version 2 or later
-//
-// Copyright (C) 2006, 2007, 2010, 2013, 2017, 2018 Albert Astals Cid <aacid@kde.org>
-// Copyright (C) 2006 Krzysztof Kowalczyk <kkowalczyk@gmail.com>
-// Copyright (C) 2013 Adrian Johnson <ajohnson@redneon.com>
-// Copyright (C) 2013 Thomas Freitag <Thomas.Freitag@alfa.de>
-//
-// To see a description of the changes please see the Changelog file that
-// came with your tarball or type make ChangeLog if you are building from git
-//
-//========================================================================
-
-#ifndef LEXER_H
-#define LEXER_H
-
-#ifdef USE_GCC_PRAGMAS
-#pragma interface
-#endif
-
-#include "Object.h"
-#include "Stream.h"
-
-class XRef;
-
-#define tokBufSize 128 // size of token buffer
-
-//------------------------------------------------------------------------
-// Lexer
-//------------------------------------------------------------------------
-
-class Lexer {
-public:
-
- // Construct a lexer for a single stream. Deletes the stream when
- // lexer is deleted.
- Lexer(XRef *xrefA, Stream *str);
-
- // Construct a lexer for a stream or array of streams (assumes obj
- // is either a stream or array of streams).
- Lexer(XRef *xrefA, Object *obj);
-
- // Destructor.
- ~Lexer();
-
- Lexer(const Lexer &) = delete;
- Lexer& operator=(const Lexer &) = delete;
-
- // Get the next object from the input stream.
- Object getObj(int objNum = -1);
- Object getObj(const char *cmdA, int objNum);
- template<typename T> Object getObj(T) = delete;
-
- // Skip to the beginning of the next line in the input stream.
- void skipToNextLine();
-
- // Skip over one character.
- void skipChar() { getChar(); }
-
- // Get stream.
- Stream *getStream()
- { return curStr.isStream() ? curStr.getStream() : (Stream *)NULL; }
-
- // Get current position in file. This is only used for error
- // messages.
- Goffset getPos()
- { return curStr.isStream() ? curStr.streamGetPos() : -1; }
-
- // Set position in file.
- void setPos(Goffset pos, int dir = 0)
- { if (curStr.isStream()) curStr.streamSetPos(pos, dir); }
-
- // Returns true if <c> is a whitespace character.
- static GBool isSpace(int c);
-
-
- // often (e.g. ~30% on PDF Refernce 1.6 pdf file from Adobe site) getChar
- // is called right after lookChar. In order to avoid expensive re-doing
- // getChar() of underlying stream, we cache the last value found by
- // lookChar() in lookCharLastValueCached. A special value
- // LOOK_VALUE_NOT_CACHED that should never be part of stream indicates
- // that no value was cached
- static const int LOOK_VALUE_NOT_CACHED = -3;
- int lookCharLastValueCached;
-
-private:
-
- int getChar(GBool comesFromLook = gFalse);
- int lookChar();
-
- Array *streams; // array of input streams
- int strPtr; // index of current stream
- Object curStr; // current stream
- GBool freeArray; // should lexer free the streams array?
- char tokBuf[tokBufSize]; // temporary token buffer
-
- XRef *xref;
-};
-
-#endif