Update neural_style_tutorial.py

Author: malfet

advanced_source/neural_style_tutorial.py

@@ -70,7 +70,6 @@
 # method is used to move tensors or modules to a desired device. 
 
 device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
-torch.set_default_device(device)
 
 ######################################################################
 # Loading the Images