Remove an unnecessary (and non-standard) CLI arg in env.vtc.

src/tests/env.vtc

@@ -12,7 +12,6 @@ varnish v1 -vcl+backend {
 
 	sub vcl_init {
 		new env = pipe.vdp("${env}");
-		env.arg("-v");
 	}
 
 	sub vcl_deliver {