back.texi: Remove unused file.

man/back.texi

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-\input rotate
-
-\font\title=ptmb at20pt
-\font\body=ptmr at12pt
-\font\price=ptmr at10pt
-
-\baselineskip=13pt
-\parskip=13pt
-\parindent=0pt
-
-\nopagenumbers
-
-\hsize=7in
-\vsize=9.25in
-
-\voffset=-1in
-\hoffset=-1in
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-\hbox to7in{%
-  \vbox to9.25in{
-    \hsize=6in
-    \leftskip=.75in
-    \rightskip=.25in
-
-    \vskip2in
-
-    \title
-    \hfil GNU Emacs\hfil
-
-    \body
-    Most of the GNU Emacs text editor is written in the programming
-    language called Emacs Lisp.  You can write new code in Emacs Lisp and
-    install it as an extension to the editor.  However, Emacs Lisp is more
-    than a mere ``extension language''; it is a full computer programming
-    language in its own right.  You can use it as you would any other
-    programming language.
-
-    Because Emacs Lisp is designed for use in an editor, it has special
-    features for scanning and parsing text as well as features for handling
-    files, buffers, displays, subprocesses, and so on.  Emacs Lisp is
-    closely integrated with the editing facilities; thus, editing commands
-    are functions that can also conveniently be called from Lisp programs,
-    and parameters for customization are ordinary Lisp variables.
-
-    This manual describes Emacs Lisp.  Generally speaking, the earlier
-    chapters describe features of Emacs Lisp that have counterparts in
-    many programming languages, and later chapters describe features that
-    are peculiar to Emacs Lisp or relate specifically to editing.
-
-    \vfil
-
-    \leftskip=0pt
-    \rightskip=0pt
-
-    \parfillskip=0pt\hfil%
-    ISBN-1-882114-04-3
-
-    \vskip.5in
-  }%
-  \setbox0=\vbox to1in{
-    \vfil\hskip.5in
-    {\price FSF $\bullet$ US\$25.00 $\bullet$ Printed in USA}
-    \vskip.5in
-  }%
-  \rotl0%
-}
-
-\eject\bye
-
-@ignore
-   arch-tag: e1830f4c-dc4a-4314-b706-a03c7e93f022
-@end ignore