Delete mkdocs.yml

docs/mkdocs.yml

-site_name:           NeRCA.jl
-repo_url:            https://github.com/tamasgal/NeRCA.jl
-site_description:    NeRCA
-site_author:         Tamás Gál
-theme:               readthedocs
-
-markdown_extensions:
-  - codehilite
-  - extra
-  - tables
-  - fenced_code
-  - mdx_math # For LaTeX
-
-extra_css:
-  - assets/Documenter.css
-
-extra_javascript:
-  - https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS_HTML
-  - assets/mathjaxhelper.js
-
-docs_dir: 'build'
-
-pages:
-- Introduction: index.md