remove markdown_highlight settings in config due to breaking changes

config.toml

@@ -11,16 +11,11 @@ compile_sass = true
 build_search_index = false
 
 [markdown]
-# Whether to do syntax highlighting
-# Theme can be customised by setting the `highlight_theme` variable to a theme supported by Zola
-highlight_code = true
-
-# The theme to use for code highlighting
-extra_syntaxes_and_themes = ["highlight_themes"]
-highlight_theme = "theme"
-
 render_emoji = true
 
+# [markdown.highlighting]
+# I have to fix a proper json file for the theme.
+
 [link_checker]
 internal_level = "warn"