Revert^2 "Port Checker to python 3"

This reverts commit 5409408a41045c7f178e362311eb51dab992d6db.

Reason for revert: The original issue (b/170308859) is fixed by
https://android-review.googlesource.com/c/platform/art/+/1458282.

Test: art/tools/checker/run_unit_tests.py
Test: art/test/testrunner/testrunner.py --host
Bug: 170308859
Bug: 162408889

Change-Id: Ibc4539403ea77a9e718c830466459e6354ef0f23

1 files changed, 0 insertions, 22 deletions

diff --git a/tools/checker/common/testing.py b/tools/checker/common/testing.py
deleted file mode 100644
index 1299c07d5f..0000000000
--- a/tools/checker/common/testing.py
+++ /dev/null
@@ -1,22 +0,0 @@
-# Copyright (C) 2014 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#   http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-def ToUnicode(string):
-  """ Converts a string into Unicode.
-
-  This is a delegate function for the built-in `unicode`. It checks if the input
-  is not `None`, because `unicode` turns it into an actual "None" string.
-  """
-  assert string is not None
-  return unicode(string)