Remove no-longer relevant xref

* doc/lispref/positions.texi (List Motion): Remove xref, the text it
references was removed in 2018-02-15 "Document
open-paren-in-column-0-is-defun-start being of less importance".

diff --git a/doc/lispref/positions.texi b/doc/lispref/positions.texi
index cd9587ba4bdbd85a2496193d7d954c0c726a28c6..7e5155782c17ba02abb2f411dfcf0599fc12a40f 100644 (file)
--- a/doc/lispref/positions.texi
+++ b/doc/lispref/positions.texi
@@ -801,8 +801,7 @@ column 0 is considered to be the start of a defun.  If it is
 @code{nil}, an open parenthesis in column 0 has no special meaning.
 The default is @code{t}.  If a string literal happens to have a
 parenthesis in column 0, escape it with a backslash to avoid a false
-positive.  @xref{Left Margin Paren,, Left Margin Convention, emacs,
-The GNU Emacs Manual}.
+positive.
 @end defopt
 
 @defvar beginning-of-defun-function