Remove stale references in ducks colab (#8833)

research/object_detection/colab_tutorials/eager_few_shot_od_training_tf2_colab.ipynb

@@ -12,10 +12,7 @@
         "Welcome to the Eager Few Shot Object Detection Colab --- in this colab we demonstrate fine tuning of a (TF2 friendly) RetinaNet architecture on very few examples of a novel class after initializing from a pre-trained COCO checkpoint.\n",
         "Training runs in eager mode.\n",
         "\n",
-        "To run this colab, you will need to connect to a borg runtime (we recommend\n",
-        "Tensorflow GPU with Python 3).\n",
-        "\n",
-        "Estimated time to run through this colab: \u003c 5 minutes."
+        "Estimated time to run through this colab (with GPU): < 5 minutes."
       ]
     },
     {