Remove unnecessary @setfilename commands from many doc/lispref/*.texi

doc/lispref/strings.texi

@@ -3,7 +3,6 @@
 @c Copyright (C) 1990-1995, 1998-1999, 2001-2012
 @c   Free Software Foundation, Inc.
 @c See the file elisp.texi for copying conditions.
-@setfilename ../../info/strings
 @node Strings and Characters, Lists, Numbers, Top
 @comment  node-name,  next,  previous,  up
 @chapter Strings and Characters

doc/lispref/symbols.texi

@@ -2,7 +2,6 @@
 @c This is part of the GNU Emacs Lisp Reference Manual.
 @c Copyright (C) 1990-1995, 1998-1999, 2001-2012 Free Software Foundation, Inc.
 @c See the file elisp.texi for copying conditions.
-@setfilename ../../info/symbols
 @node Symbols, Evaluation, Hash Tables, Top
 @chapter Symbols
 @cindex symbol

doc/lispref/syntax.texi

@@ -3,7 +3,6 @@
 @c Copyright (C) 1990-1995, 1998-1999, 2001-2012
 @c   Free Software Foundation, Inc.
 @c See the file elisp.texi for copying conditions.
-@setfilename ../../info/syntax
 @node Syntax Tables, Abbrevs, Searching and Matching, Top
 @chapter Syntax Tables
 @cindex parsing buffer text

doc/lispref/text.texi

@@ -2,7 +2,6 @@
 @c This is part of the GNU Emacs Lisp Reference Manual.
 @c Copyright (C) 1990-1995, 1998-2012 Free Software Foundation, Inc.
 @c See the file elisp.texi for copying conditions.
-@setfilename ../../info/text
 @node Text, Non-ASCII Characters, Markers, Top
 @chapter Text
 @cindex text

doc/lispref/tips.texi

@@ -3,7 +3,6 @@
 @c Copyright (C) 1990-1993, 1995, 1998-1999, 2001-2012
 @c   Free Software Foundation, Inc.
 @c See the file elisp.texi for copying conditions.
-@setfilename ../../info/tips
 @node Tips, GNU Emacs Internals, GPL, Top
 @appendix Tips and Conventions
 @cindex tips for writing Lisp

doc/lispref/variables.texi

@@ -2,7 +2,6 @@
 @c This is part of the GNU Emacs Lisp Reference Manual.
 @c Copyright (C) 1990-1995, 1998-2012 Free Software Foundation, Inc.
 @c See the file elisp.texi for copying conditions.
-@setfilename ../../info/variables
 @node Variables, Functions, Control Structures, Top
 @chapter Variables
 @cindex variable

doc/lispref/windows.texi

@@ -3,7 +3,6 @@
 @c Copyright (C) 1990-1995, 1998-1999, 2001-2012
 @c   Free Software Foundation, Inc.
 @c See the file elisp.texi for copying conditions.
-@setfilename ../../info/windows
 @node Windows, Frames, Buffers, Top
 @chapter Windows