Remove get_started.rst page with links to outdated notebooks

docs/_toc.yml

@@ -7,7 +7,6 @@ parts:
 - caption: Get started!
   chapters:
     - file: notebooks/intro
-    - file: tutorials/get_started
     - file: notebooks/L0_overview
     - file: notebooks/L1_Batch
     - file: notebooks/L2_Buffer

docs/index.rst

@@ -98,7 +98,6 @@ Tianshou is still under development, you can also check out the documents in sta
    :caption: Get started:
 
    notebooks/intro
-   tutorials/get_started
    notebooks/L0_overview
    notebooks/L1_Batch
    notebooks/L2_Buffer

docs/tutorials/get_started.rst

@@ -1,13 +0,0 @@
-Get Started with Jupyter Notebook
-=================================
-
-In this tutorial, we will use Google Colaboratory to show you the most basic usages of common building blocks in Tianshou. You will be guided step by step to see how different modules in Tianshou collaborate with each other to conduct a classic DRL experiment (PPO algorithm for CartPole-v0 environment).
-
-- L0:  `Overview <https://colab.research.google.com/drive/1yavOkfSTbyBD24-dyQzdETFN9YA7ioor?usp=sharing>`_
-- L1:  `Batch <https://colab.research.google.com/drive/1uklagjDxYjJERS9gJvgbPnV1BtMuXvOR?usp=sharing>`_
-- L2:  `Replay Buffer <https://colab.research.google.com/drive/1sfw-dDy02Gado-WuYlHAQsyWhZ33D1bd?usp=sharing>`_
-- L3:  `Vectorized Environment <https://colab.research.google.com/drive/1ABk2BgjzvC4DZu1rDxGzd2Uqjo3FRLEy?usp=sharing>`_
-- L4:  `Policy <https://colab.research.google.com/drive/1MhzYXtUEfnRrlAVSB3SR83r0HA5wds2i?usp=sharing>`_
-- L5:  `Collector <https://colab.research.google.com/drive/1CvOTPiNXdSST04I75Wuyvy_hZ949zKHZ?usp=sharing>`_
-- L6:  `Trainer <https://colab.research.google.com/drive/1qMsEiZZ8mh60ycbfoX-nYy6qMCnLkmZE?usp=sharing>`_
-- L7:  `Experiment <https://colab.research.google.com/drive/1CieGncgbGCt2grx8Mzwb7YTmFB0AGJ0f?usp=sharing>`_