Update deepracer_rl.ipynb

Deleted previously commented out line.

Author: heat-jr

dpr401/deepracer_rl.ipynb

@@ -78,7 +78,6 @@
     "from misc import get_execution_role, wait_for_s3_object\n",
     "from docker_utils import build_docker_image\n",
     "from docker_utils import push as docker_push\n",
-    #"from sagemaker.rl import RLEstimator, RLToolkit, RLFramework\n",
     "from time import gmtime, strftime\n",
     "import time\n",
     "from IPython.display import Markdown\n",