Update ADD_TO_EXISTING_PACKAGE.md

Co-authored-by: Stefan Verhoeven <stefan.verhoeven@gmail.com>

Author: eriktks

ADD_TO_EXISTING_PACKAGE.md

@@ -25,8 +25,3 @@ $ git add --all
 $ git commit -m "Merged existing code with code generated by `cookiecutter https://github.com/NLeSC/python-template`"
 $ git push
 ```
-5. Push the new repository to Github:
-```shell
-$ git remote add origin https://github.com/ORGANIZATION/EXISTING_PACKAGE
-$ git push
-```