content(fix): remove default value from front matter

Signed-off-by: Patrick Kollitsch <patrick@davids-neighbour.com>

exampleSite/content/en/post/chapter-6.md

@@ -4,7 +4,6 @@ description: "Esmeralda"
 featured_image: "/images/esmeralda.jpg"
 tags: []
 title: "Chapter VI: Esmeralda"
-disable_share: false
 ---
 We are delighted to be able to inform the reader, that during the whole of
 this scene, Gringoire and his piece had stood firm. His actors, spurred on