Fix double full parse of content when emitting all docs (#77)

Author: Mpdreamz

docs/source/nested/index.md

@@ -2,4 +2,4 @@
 title: Nested content
 ---
 
-This bucket is an example of nested content. Head down the tree to see how it works.
+This bucket is an example of nested content. Head down the tree to see how it works.

src/Elastic.Markdown/DocumentationGenerator.cs

@@ -109,10 +109,7 @@ await Parallel.ForEachAsync(DocumentationSet.Files, ctx, async (file, token) =>
 			var item = Interlocked.Increment(ref handledItems);
 			var outputFile = OutputFile(file.RelativePath);
 			if (file is MarkdownFile markdown)
-			{
-				await markdown.ParseFullAsync(token);
 				await HtmlWriter.WriteAsync(outputFile, markdown, token);
-			}
 			else
 			{
 				if (outputFile.Directory is { Exists: false })