Remove duplicate Reinforcement Learning Tutorial

Author: Jessica Lin

index.rst

@@ -152,18 +152,6 @@ Text
 Reinforcement Learning
 ----------------------
 
-.. customgalleryitem::
-    :tooltip: Use PyTorch to train a Deep Q Learning (DQN) agent
-    :figure: /_static/img/cartpole.gif
-    :description: :doc:`intermediate/reinforcement_q_learning`
-
-.. raw:: html
-
-    <div style='clear:both'></div>
-
-Reinforcement Learning
-----------------------
-
 .. customgalleryitem::
     :tooltip: Use PyTorch to train a Deep Q Learning (DQN) agent
     :figure: /_static/img/cartpole.gif