Disable jekyll-optional-front-matter plugin

Author: vivienlacourba

Gemfile

@@ -14,7 +14,6 @@ gem "jekyll", "~> 4.1.0"
 
 # our markdown files don't have frontmatter
 group :jekyll_plugins do
-  gem 'jekyll-optional-front-matter'
   gem "jekyll-titles-from-headings"
   gem "jekyll-relative-links"
   gem 'jekyll-commonmark'

_config.yml

@@ -12,7 +12,5 @@ defaults:
     values:
       layout: "default"
 exclude: ["README.md", "**/README.md"]
-optional_front_matter:
-  remove_originals: true
 toc:
   max_level: 3