Remove dead symbolic links

for i in `find .`; do if (test -h $i); then file $i|grep broken; fi; done

./es/99book.bib: broken symbolic link to `../en/99book.bib'
./es/bookhtml.cfg: broken symbolic link to `../en/bookhtml.cfg'
./es/fixhtml.py: broken symbolic link to `../en/fixhtml.py'
./es/hgbook.css: broken symbolic link to `../en/hgbook.css'
./es/htlatex.book: broken symbolic link to `../en/htlatex.book'

     1.1 --- a/en/examples/mq.qinit-help	Mon Jul 17 00:00:12 2006 -0700
     1.2 +++ b/en/examples/mq.qinit-help	Thu May 21 14:26:31 2009 +0800
     1.3 @@ -1,3 +1,5 @@
     1.4 +#!/bin/bash
     1.5 +
     1.6  echo '[extensions]' >> $HGRC
     1.7  echo 'hgext.mq =' >> $HGRC
     1.8