diff --git a/2018-edition/book.toml b/2018-edition/book.toml
index 9c71e2a9..03b59090 100644
--- a/2018-edition/book.toml
+++ b/2018-edition/book.toml
@@ -3,5 +3,5 @@ title = "The Rust Programming Language"
author = "Steve Klabnik and Carol Nichols, with Contributions from the Rust Community"
[output.html]
-additional-css = ["ferris.css", "src/theme/2018-edition.css"]
+additional-css = ["ferris.css"]
additional-js = ["ferris.js"]
diff --git a/2018-edition/src/theme/2018-edition.css b/2018-edition/src/theme/2018-edition.css
deleted file mode 100644
index b1dcf936..00000000
--- a/2018-edition/src/theme/2018-edition.css
+++ /dev/null
@@ -1,9 +0,0 @@
-span.caption {
- font-size: .8em;
- font-weight: 600;
-}
-
-span.caption code {
- font-size: 0.875em;
- font-weight: 400;
-}
diff --git a/2018-edition/src/theme/index.hbs b/2018-edition/src/theme/index.hbs
deleted file mode 100644
index f3f1b52f..00000000
--- a/2018-edition/src/theme/index.hbs
+++ /dev/null
@@ -1,37 +0,0 @@
-
-
-
-
-
- Outdated link: {{ title }}
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- {{#each additional_css}}
-
- {{/each}}
-
-
-
-
- {{> header}}
-
-
- {{{ content }}}
-
-
-
-