From b98a1e17102630c03051b8fd20b4c6ea4b3185ed Mon Sep 17 00:00:00 2001
From: James Munns <james.munns@ferrous-systems.com>
Date: Thu, 10 Jan 2019 21:18:13 +0100
Subject: [PATCH] No consumers of MdBook2 yet

---
 src/bootstrap/doc.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/bootstrap/doc.rs b/src/bootstrap/doc.rs
index c428f29d706..08e97396fd6 100644
--- a/src/bootstrap/doc.rs
+++ b/src/bootstrap/doc.rs
@@ -71,6 +71,10 @@ book!(
 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
 enum RustbookVersion {
     MdBook1,
+
+    /// Note: Currently no books use mdBook v2, but we want the option
+    /// to be available
+    #[allow(dead_code)]
     MdBook2,
 }