Remove the `file_utils` module

It was created in 2012 to support S3/EC2 testing. We don't
need it anymore, it's not used anywhere.

Change-Id: I2665440db12a9597b08f54b8dc5d0fe65f14939a
diff --git a/tempest/common/utils/file_utils.py b/tempest/common/utils/file_utils.py
deleted file mode 100644
index 43083f4..0000000
--- a/tempest/common/utils/file_utils.py
+++ /dev/null
@@ -1,23 +0,0 @@
-# Copyright 2012 OpenStack Foundation
-# All Rights Reserved.
-#
-#    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 have_effective_read_access(path):
-    try:
-        fh = open(path, "rb")
-    except IOError:
-        return False
-    fh.close()
-    return True
diff --git a/tempest/tests/common/utils/test_file_utils.py b/tempest/tests/common/utils/test_file_utils.py
deleted file mode 100644
index 937aefa..0000000
--- a/tempest/tests/common/utils/test_file_utils.py
+++ /dev/null
@@ -1,32 +0,0 @@
-# Copyright 2014 IBM Corp.
-# All Rights Reserved.
-#
-#    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.
-
-import mock
-
-from tempest.common.utils import file_utils
-from tempest.tests import base
-
-
-class TestFileUtils(base.TestCase):
-
-    def test_have_effective_read_path(self):
-        with mock.patch('six.moves.builtins.open', mock.mock_open(),
-                        create=True):
-            result = file_utils.have_effective_read_access('fake_path')
-        self.assertTrue(result)
-
-    def test_not_effective_read_path(self):
-        result = file_utils.have_effective_read_access('fake_path')
-        self.assertFalse(result)