Remove useless lines.

lib/UserInterface/UserInterface.cpp

@@ -25,25 +25,6 @@
 #include "clang/Basic/LangOptions.h"
 #include "clang/Frontend/CompilerInstance.h"
 
-// Fragment copied from LLVM's raw_ostream.cpp
-#if defined(HAVE_UNISTD_H)
-# include <unistd.h>
-#endif
-
-#if defined(_MSC_VER)
-#ifndef STDIN_FILENO
-# define STDIN_FILENO 0
-#endif
-#ifndef STDOUT_FILENO
-# define STDOUT_FILENO 1
-#endif
-#ifndef STDERR_FILENO
-# define STDERR_FILENO 2
-#endif
-#endif
-
-#include <memory>
-
 namespace {
   ///\brief Class that specialises the textinput TabCompletion to allow Cling
   /// to code complete through its own textinput mechanism which is part of the