Remove unused fields in test.py

Remove unused fields in test.py

Committed: https://code.google.com/p/v8/source/detail?r=12218

[haitao.feng, 2012-07-25 07:30:33]

You might want to mention in the wiki:

"If there are many fails in the unit tests, consider using Make
$arch.$mode.check TESTFLAGS="--progress dots 1>stdout 2>stderr" to print the
fail results in the stdout file". 

The default progress indicator provides ClearLine functionality and will print
\r in the redirected file which make the file hard to read.

[Jakob Kummerow, 2012-07-30 09:09:03]

LGTM, landing.