docs flow working with mocked markup to html

docs/src/def.rs

@@ -1,14 +1,4 @@
 use crate::html::ToHtml;
-use roc_code_markup::{markup::nodes::{MarkupNode}};
-
-impl<'a> ToHtml<'a> for MarkupNode {
-    fn css_class(&self) -> Option<&'a str> {
-        Some("operator")
-    }
-    fn html_body(&self, buf: &mut bumpalo::collections::String<'a>) {
-        buf.push_str("MarkupNode")
-    }
-}
 
 struct EqualSign;