fix normalization

Author: StoneT2000

SP21/GAN/vanilla_gan.ipynb

@@ -101,9 +101,7 @@
     "img_shape = (28, 28)\n",
     "batch_size = 64\n",
     "\n",
-    "transform = transforms.Compose([\n",
-    "    transforms.ToTensor(),\n",
-    "    transforms.Normalize(mean=(0.5), std=(0.5))])\n",
+    "transform = transforms.Compose([transforms.ToTensor()])\n",
     "train_dataset = torchvision.datasets.MNIST(root=\"./data\", train = True, download=True, transform=transform)\n",
     "train_dataloader = torch.utils.data.DataLoader(train_dataset, batch_size=batch_size, shuffle=True)"
    ]