Hide internal colab magic methods from OSS, they don't work with jupyter.

PiperOrigin-RevId: 289117201

Author: afrozenator

tensor2tensor/notebooks/Transformer_translate.ipynb

@@ -108,7 +108,6 @@
         "colab": {}
       },
       "source": [
-        "%tensorflow_version 1.x\n",
         "import tensorflow as tf\n",
         "import os\n",
         "\n",
@@ -1100,4 +1099,4 @@
       "outputs": []
     }
   ]
-}
+}

tensor2tensor/notebooks/asr_transformer.ipynb

@@ -70,7 +70,6 @@
       },
       "outputs": [],
       "source": [
-        "%tensorflow_version 1.x\n",
         "import tensorflow as tf\n",
         "import matplotlib.pyplot as plt\n",
         "import numpy as np\n",

tensor2tensor/notebooks/hello_t2t.ipynb

@@ -65,7 +65,6 @@
       "outputs": [],
       "source": [
         "# Imports we need.\n",
-        "%tensorflow_version 1.x\n",
         "import tensorflow as tf\n",
         "import matplotlib.pyplot as plt\n",
         "import numpy as np\n",

tensor2tensor/notebooks/t2t_problem.ipynb

@@ -136,7 +136,6 @@
       "source": [
         "#@title Run this only once - Sets up TF Eager execution.\n",
         "\n",
-        "%tensorflow_version 1.x\n",
         "import tensorflow as tf\n",
         "\n",
         "# Enable Eager execution - useful for seeing the generated data.\n",