remove github pages config

don't think we need github pages for a readme

_config.yml

@@ -1,23 +0,0 @@
-theme: jekyll-theme-primer
-url: "https://nix-community.github.io/infra"
-
-# see https://github.com/github/pages-gem/blob/754a725e4766d4329bb1dd0e07c638a045ad2c04/lib/github-pages/plugins.rb#L6-L42
-plugins:
-  - jemoji
-  - jekyll-avatar
-  - jekyll-default-layout
-  - jekyll-feed
-  - jekyll-mentions
-  - jekyll-readme-index
-  - jekyll-sitemap
-
-markdown: CommonMarkGhPages
-# see https://github.com/gjtorikian/commonmarker#parse-options
-commonmark:
-  options:
-    - FOOTNOTES
-    - SMART
-  extensions:
-    - autolink
-    - strikethrough
-    - table