Fix README.rst

Author: eucyt

README.rst

@@ -376,63 +376,6 @@ Contributing
 ------------
 Please check `CONTRIBUTING <CONTRIBUTING.md>`__ before making a contribution.
 
-For SDK developers
-------------------
-
-First install for development.
-
-::
-
-    $ pip install -r requirements-dev.txt
-
-
-You can generate new or fixed models and APIs by this command.
-
-::
-
-    $ python generate-code.py
-
-
-When you update line-bot-sdk-python version, please update `linebot/__about__.py <linebot/__about__.py>`__ and generate code again.
-
-
-If you edit `README.rst <README.rst>`__, you should execute the following command to check the syntax of README.
-
-::
-
-    $ python -m readme_renderer README.rst
-
-
-Run tests
-~~~~~~~~~
-
-Test by using tox. We test against the following versions.
-
--  3.9
--  3.10
--  3.11
--  3.12
--  3.13
-
-To run all tests and to run ``flake8`` against all versions, use:
-
-::
-
-    tox
-
-To run all tests against version 3.10, use:
-
-::
-
-    $ tox -e py3.10
-
-To run a test against version 3.10 and against a specific file, use:
-
-::
-
-    $ tox -e py3.10 -- tests/test_webhook.py
-
-
 .. |PyPI version| image:: https://badge.fury.io/py/line-bot-sdk.svg
    :target: https://badge.fury.io/py/line-bot-sdk