Show that --timeout doesn't work if the build produces log output

tests/timeout.builder.sh

@@ -1,2 +1,2 @@
 echo "\`timeout' builder entering an infinite loop"
-while true ; do : ; done
+while true ; do echo foo; sleep 1; done

tests/timeout.nix

@@ -3,6 +3,4 @@ with import ./config.nix;
 mkDerivation {
   name = "timeout";
   builder = ./timeout.builder.sh;
-  PATH = "";
-  goodPath = path;
 }