Remove some old __future__ imports

Author: rwightman

timm/data/dataset.py

@@ -2,10 +2,6 @@
 
 Hacked together by / Copyright 2020 Ross Wightman
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-
 import torch.utils.data as data
 
 import os

timm/data/tf_preprocessing.py

@@ -22,10 +22,6 @@
 # limitations under the License.
 # ==============================================================================
 """ImageNet preprocessing for MnasNet."""
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-
 import tensorflow as tf
 import numpy as np
 

timm/models/dpn.py

@@ -6,10 +6,6 @@
 
 Hacked together by / Copyright 2020 Ross Wightman
 """
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import print_function
-
 from collections import OrderedDict
 from typing import Tuple