fix import errors

keras_contrib/activations.py

@@ -1,5 +1,3 @@
 from __future__ import absolute_import
 from . import backend as K
-from keras.utils.generic_utils import get_from_module
-
 from keras.activations import *

keras_contrib/initializations.py

@@ -1,11 +1,4 @@
 from __future__ import absolute_import
 import numpy as np
 from . import backend as K
-from keras.utils.generic_utils import get_from_module
-
 from keras.initializations import *
-
-
-def get(identifier, **kwargs):
-    return get_from_module(identifier, globals(),
-                           'initialization', kwargs=kwargs)