Minor notebook corrections

Author: Anastasia

Keras-Fine-Tuning/keras-finetune-vgg.ipynb

@@ -34,16 +34,7 @@
     "random.seed(seed)\n",
     "tf.random.set_seed(seed)\n",
     "np.random.seed(seed)\n",
-    "os.environ['TF_DETERMINISTIC_OPS'] = '1'\n",
-    "\n",
-    "is_use_gpu = True\n",
-    "if is_use_gpu:\n",
-    "    gpu_devices = tf.config.list_physical_devices('GPU')\n",
-    "    tf.config.experimental.set_visible_devices(gpu_devices[0], 'GPU')\n",
-    "    tf.config.experimental.set_memory_growth(gpu_devices[0], True)\n",
-    "    os.environ['TF_USE_CUDNN'] = '1'\n",
-    "else:\n",
-    "    os.environ[\"CUDA_VISIBLE_DEVICES\"] =\"-1\""
+    "os.environ['TF_DETERMINISTIC_OPS'] = '1'"
    ]
   },
   {