Remove stray -a description.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@1021 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishstat/varnishstat.1

@@ -32,8 +32,6 @@ The following options are available:
 .It Fl 1
 Instead of presenting of a continuously updated display, print the
 statistics once and exit.
-.It Fl a
-When writing to a file, append to it rather than overwrite it.
 .It Fl b
 Include log entries which result from communication with a backend
 server.