test/py: Drop importing utils as util

Now that we have a shorter name, we don't need this sort of thing.
Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com> # test_android

test/py/tests/test_android/test_avb.py

@@ -15,7 +15,6 @@ For configuration verification:
 """
 
 import pytest
-import utils as util
 
 # defauld mmc id
 mmc_dev = 1