Remove useless __future__ imports

We're in the future.

Change-Id: I5b0ac0bc6d8d01c1f8db5a1f93951b80c49f1c93
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

wsme/rest/json.py

@@ -1,5 +1,4 @@
 """REST+Json protocol implementation."""
-from __future__ import absolute_import
 
 import datetime
 import decimal

wsme/rest/xml.py

@@ -1,5 +1,3 @@
-from __future__ import absolute_import
-
 import datetime
 
 import xml.etree.ElementTree as et

wsmeext/flask.py

@@ -1,5 +1,3 @@
-from __future__ import absolute_import
-
 import functools
 import logging
 import sys

wsmeext/pecan.py

@@ -1,5 +1,3 @@
-from __future__ import absolute_import
-
 import functools
 import inspect
 import sys