Added additional corrections due to the comments

Author: Anastasia

KerasCNN-CIFAR/keras-cnn-cifar10.ipynb

@@ -41,17 +41,7 @@
     "tf.random.set_seed(seed)\n",
     "np.random.seed(seed)\n",
     "\n",
-    "os.environ['TF_DETERMINISTIC_OPS'] = '1'\n",
-    "\n",
-    "\n",
-    "gpu_devices = tf.config.list_physical_devices('GPU')  # get list of GPUs\n",
-    "\n",
-    "if gpu_devices:  # if there are any gpu devices use first 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'] = \"true\"\n",
-    "else:  # else use CPU\n",
-    "    os.environ[\"CUDA_VISIBLE_DEVICES\"] = \"-1\""
+    "os.environ['TF_DETERMINISTIC_OPS'] = '1'"
    ]
   },
   {