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
diff --git a/test/py/tests/test_fit_ecdsa.py b/test/py/tests/test_fit_ecdsa.py
index 7b25c77..63f2f6a 100644
--- a/test/py/tests/test_fit_ecdsa.py
+++ b/test/py/tests/test_fit_ecdsa.py
@@ -12,7 +12,7 @@
 
 import os
 import pytest
-import utils as util
+import utils
 from Cryptodome.Hash import SHA256
 from Cryptodome.PublicKey import ECC
 from Cryptodome.Signature import DSS
@@ -25,14 +25,16 @@
         self.signable_nodes = set()
 
     def __fdt_list(self, path):
-        return util.run_and_log(self.cons, f'fdtget -l {self.fit} {path}')
+        return utils.run_and_log(self.cons, f'fdtget -l {self.fit} {path}')
 
     def __fdt_set(self, node, **prop_value):
         for prop, value in prop_value.items():
-            util.run_and_log(self.cons, f'fdtput -ts {self.fit} {node} {prop} {value}')
+            utils.run_and_log(self.cons,
+                              f'fdtput -ts {self.fit} {node} {prop} {value}')
 
     def __fdt_get_binary(self, node, prop):
-        numbers = util.run_and_log(self.cons, f'fdtget -tbi {self.fit} {node} {prop}')
+        numbers = utils.run_and_log(self.cons,
+                                    f'fdtget -tbi {self.fit} {node} {prop}')
 
         bignum = bytearray()
         for little_num in numbers.split():
@@ -53,7 +55,7 @@
             self.__fdt_set(f'{image}/signature', algo='sha256,ecdsa256')
 
     def sign(self, mkimage, key_file):
-        util.run_and_log(self.cons, [mkimage, '-F', self.fit, f'-G{key_file}'])
+        utils.run_and_log(self.cons, [mkimage, '-F', self.fit, f'-G{key_file}'])
 
     def check_signatures(self, key):
         for image in self.signable_nodes:
@@ -76,11 +78,11 @@
 
     def assemble_fit_image(dest_fit, its, destdir):
         dtc_args = f'-I dts -O dtb -i {destdir}'
-        util.run_and_log(cons, [mkimage, '-D', dtc_args, '-f', its, dest_fit])
+        utils.run_and_log(cons, [mkimage, '-D', dtc_args, '-f', its, dest_fit])
 
     def dtc(dts):
         dtb = dts.replace('.dts', '.dtb')
-        util.run_and_log(cons, f'dtc {datadir}/{dts} -O dtb -o {tempdir}/{dtb}')
+        utils.run_and_log(cons, f'dtc {datadir}/{dts} -O dtb -o {tempdir}/{dtb}')
 
     cons = ubman
     mkimage = cons.config.build_dir + '/tools/mkimage'