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diff --git a/release_23/include/llvm/Debugger/SourceFile.h b/release_23/include/llvm/Debugger/SourceFile.h
deleted file mode 100644
index 249435af8b17..000000000000
--- a/release_23/include/llvm/Debugger/SourceFile.h
+++ /dev/null
@@ -1,87 +0,0 @@
-//===- SourceFile.h - Class to represent a source code file -----*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines the SourceFile class which is used to represent a single
-// file of source code in the program, caching data from the file to make access
-// efficient.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_DEBUGGER_SOURCEFILE_H
-#define LLVM_DEBUGGER_SOURCEFILE_H
-
-#include "llvm/System/Path.h"
-#include "llvm/ADT/OwningPtr.h"
-#include <vector>
-
-namespace llvm {
-  class GlobalVariable;
-  class MemoryBuffer;
-
-  class SourceFile {
-    /// Filename - This is the full path of the file that is loaded.
-    ///
-    sys::Path Filename;
-
-    /// Descriptor - The debugging descriptor for this source file.  If there
-    /// are multiple descriptors for the same file, this is just the first one
-    /// encountered.
-    ///
-    const GlobalVariable *Descriptor;
-
-    /// This is the memory mapping for the file so we can gain access to it.
-    OwningPtr<MemoryBuffer> File;
-
-    /// LineOffset - This vector contains a mapping from source line numbers to
-    /// their offsets in the file.  This data is computed lazily, the first time
-    /// it is asked for.  If there are zero elements allocated in this vector,
-    /// then it has not yet been computed.
-    mutable std::vector<unsigned> LineOffset;
-
-  public:
-    /// SourceFile constructor - Read in the specified source file if it exists,
-    /// but do not build the LineOffsets table until it is requested.  This will
-    /// NOT throw an exception if the file is not found, if there is an error
-    /// reading it, or if the user cancels the operation.  Instead, it will just
-    /// be an empty source file.
-    SourceFile(const std::string &fn, const GlobalVariable *Desc);
-    
-    ~SourceFile();
-
-    /// getDescriptor - Return the debugging decriptor for this source file.
-    ///
-    const GlobalVariable *getDescriptor() const { return Descriptor; }
-
-    /// getFilename - Return the fully resolved path that this file was loaded
-    /// from.
-    const std::string &getFilename() const { return Filename.toString(); }
-
-    /// getSourceLine - Given a line number, return the start and end of the
-    /// line in the file.  If the line number is invalid, or if the file could
-    /// not be loaded, null pointers are returned for the start and end of the
-    /// file.  Note that line numbers start with 0, not 1.  This also strips off
-    /// any newlines from the end of the line, to ease formatting of the text.
-    void getSourceLine(unsigned LineNo, const char *&LineStart,
-                       const char *&LineEnd) const;
-
-    /// getNumLines - Return the number of lines the source file contains.
-    ///
-    unsigned getNumLines() const {
-      if (LineOffset.empty()) calculateLineOffsets();
-      return static_cast<unsigned>(LineOffset.size());
-    }
-
-  private:
-    /// calculateLineOffsets - Compute the LineOffset vector for the current
-    /// file.
-    void calculateLineOffsets() const;
-  };
-} // end namespace llvm
-
-#endif