remove unused imports and useless empty class Base

Change-Id: I78dbb390cf0afe03d4bcf1aa9ffc9497392579dd

test/functional/tests.py

@@ -14,32 +14,23 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import array
 from datetime import datetime
 import locale
-import os
-import os.path
 import random
 import StringIO
-import sys
 import time
 import threading
 import uuid
 import unittest
-import urllib
 
 from test import get_config
-from swift import Account, AuthenticationFailed, Connection, Container, \
-     File, ResponseError
+from test.functional.swift import Account, Connection, File, ResponseError
 
 config = get_config()
 
 locale.setlocale(locale.LC_COLLATE, config.get('collate', 'C'))
 
 
-class Base:
-    pass
-
 def chunks(s, length=3):
     i, j = 0, length
     while i < len(s):