Remove line missed in previous commit

src/tools/msvc/vcregress.pl

@@ -606,7 +606,6 @@ sub upgradecheck
 	print "\nStarting new cluster\n\n";
 	@args = ('pg_ctl', '-l', "$logdir/postmaster2.log", 'start');
 	system(@args) == 0 or exit 1;
-	system(@args) == 0 or exit 1;
 	print "\nDumping new cluster\n\n";
 	@args = ('pg_dumpall', '-f', "$tmp_root/dump2.sql");
 	system(@args) == 0 or exit 1;