bootstrap: remove libtool patch for cygwin as we now use libtool 'properly'

bootstrap

@@ -365,23 +365,6 @@ if test -f "ltmain.sh"; then
   mv ltmain.sh autotools/
 fi
 
-# patch for DLL link for libtool on cygwin (remove when fixed)
-if test ".`uname -s|sed -n '/^CYGWIN/p'`" != "."; then
-patch -s -p0 << 'EOF'
---- autotools/ltmain.orig	2006-12-05 15:15:42.064607000 +0000
-+++ autotools/ltmain.sh	2006-12-05 15:16:24.705777800 +0000
-@@ -4360,7 +4360,7 @@
- 
-     prog)
-       case $host in
--	*cygwin*) output=`$echo $output | ${SED} -e 's,.exe$,,;s,$,.exe,'` ;;
-+	*cygwin*) output=`$echo $output | ${SED} -e 's,.exe$,,;s,$,.exe,;s,.dll.exe$,.dll,'` ;;
-       esac
-       if test -n "$vinfo"; then
- 	$echo "$modename: warning: \`-version-info' is ignored for programs" 1>&2
-EOF
-fi
-
 # Do the rest
 ${autopoint} -f
 rm -f po/Makevars.template