diff --git a/first-edition/book.toml b/first-edition/book.toml
index d365a01c..3a3189c4 100644
--- a/first-edition/book.toml
+++ b/first-edition/book.toml
@@ -1,6 +1,3 @@
 [book]
 title = "The Rust Programming Language"
 author = "The Rust Project Developers"
-
-[output.html]
-additional-css = ["src/theme/first-edition.css"]
diff --git a/first-edition/src/theme/first-edition.css b/first-edition/src/theme/first-edition.css
deleted file mode 100644
index 6ff716b4..00000000
--- a/first-edition/src/theme/first-edition.css
+++ /dev/null
@@ -1,56 +0,0 @@
-.warning {
-    display: flex;
-    justify-content: space-between;
-    align-items: center;
-    background-color: rgb(242, 222, 222);
-    border-bottom-color: rgb(238, 211, 215);
-    border-bottom-left-radius: 4px;
-    border-bottom-right-radius: 4px;
-    border-bottom-style: solid;
-    border-bottom-width: 0.666667px;
-    border-image-outset: 0 0 0 0;
-    border-image-repeat: stretch stretch;
-    border-image-slice: 100% 100% 100% 100%;
-    border-image-source: none;
-    border-image-width: 1 1 1 1;
-    border-left-color: rgb(238, 211, 215);
-    border-left-style: solid;
-    border-left-width: 0.666667px;
-    border-right-color: rgb(238, 211, 215);
-    border-right-style: solid;
-    border-right-width: 0.666667px;
-    border-top-color: rgb(238, 211, 215);
-    border-top-left-radius: 4px;
-    border-top-right-radius: 4px;
-    border-top-style: solid;
-    border-top-width: 0.666667px;
-    color: rgb(185, 74, 72);
-    margin-bottom: 0px;
-    margin-left: 0px;
-    margin-right: 0px;
-    margin-top: 30px;
-    padding-bottom: 8px;
-    padding-left: 14px;
-    padding-right: 35px;
-    padding-right: 14px;
-    padding-top: 8px;
-}
-.warning strong {
-    color: rgb(185, 74, 72)
-}
-.warning a {
-    color: rgb(0, 136, 204)
-}
-.warning .message {
-    margin-right: 14px;
-}
-.warning .message:last-child {
-    margin-right: 21px;
-}
-.warning .button {
-    border: none;
-    background: none;
-    color: inherit;
-    cursor: pointer;
-    font-size: 14px;
-}
diff --git a/first-edition/src/theme/header.hbs b/first-edition/src/theme/header.hbs
deleted file mode 100644
index 77a74786..00000000
--- a/first-edition/src/theme/header.hbs
+++ /dev/null
@@ -1,27 +0,0 @@
-<div id="draft-warning" class="warning">
-    <span class="message">You are reading an <strong>outdated</strong> edition of TRPL. For more, go <a href="../index.html">here</a>.</span>
-    <button type="button" id="hide-draft-warning" title="Hide draft warning" class="button">
-        <i class="fa fa-times"></i>
-    </button>
-</div>
-<!-- Hide / unhide warning before it is displayed -->
-<script type="text/javascript">
-var warning = localStorage.getItem('trpl-first-edition-draft-warning');
-
-if (warning === 'hidden') {
-    Array
-    .from(document.querySelectorAll('#page-wrapper'))
-    .forEach(function(block) { block.classList.remove('has-warning'); });
-    var elem = document.getElementById("draft-warning");
-    elem.parentNode.removeChild(elem);
-}
-
-document.addEventListener("DOMContentLoaded", function(event) { 
-    document.getElementById("hide-draft-warning").addEventListener("click", function(e) {
-        var elem = document.getElementById("draft-warning");
-        elem.parentNode.removeChild(elem);
-
-        localStorage.setItem('trpl-first-edition-draft-warning', 'hidden');
-    });
-});
-</script>
diff --git a/first-edition/src/theme/index.hbs b/first-edition/src/theme/index.hbs
deleted file mode 100644
index f3f1b52f..00000000
--- a/first-edition/src/theme/index.hbs
+++ /dev/null
@@ -1,37 +0,0 @@
-<!DOCTYPE HTML>
-<html lang="{{ language }}" class="no-js">
-    <head>
-        <!-- Book generated using mdBook -->
-        <meta charset="UTF-8">
-        <title>Outdated link: {{ title }}</title>
-        <meta name="robots" content="noindex,follow">
-        <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
-
-        <base href="{{ path_to_root }}">
-
-        <link rel="stylesheet" href="book.css">
-        <link href="https://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800" rel="stylesheet" type="text/css">
-        <link href="https://fonts.googleapis.com/css?family=Source+Code+Pro:500" rel="stylesheet" type="text/css">
-
-        <link rel="stylesheet" href="highlight.css">
-        <link rel="stylesheet" href="tomorrow-night.css">
-        <link rel="stylesheet" href="ayu-highlight.css">
-
-        <!-- Custom theme stylesheets -->
-        {{#each additional_css}}
-        <link rel="stylesheet" href="{{this}}">
-        {{/each}}
-    </head>
-    <body class="light">
-        <div id="page-wrapper" class="page-wrapper">
-            <div class="page">
-                {{> header}}
-                <div id="content" class="content">
-                    <main>
-                        {{{ content }}}
-                    </main>
-                </div>
-            </div>
-        </div>
-    </body>
-</html>
diff --git a/second-edition/src/theme/index.hbs b/second-edition/src/theme/index.hbs
deleted file mode 100644
index f3f1b52f..00000000
--- a/second-edition/src/theme/index.hbs
+++ /dev/null
@@ -1,37 +0,0 @@
-<!DOCTYPE HTML>
-<html lang="{{ language }}" class="no-js">
-    <head>
-        <!-- Book generated using mdBook -->
-        <meta charset="UTF-8">
-        <title>Outdated link: {{ title }}</title>
-        <meta name="robots" content="noindex,follow">
-        <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
-
-        <base href="{{ path_to_root }}">
-
-        <link rel="stylesheet" href="book.css">
-        <link href="https://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800" rel="stylesheet" type="text/css">
-        <link href="https://fonts.googleapis.com/css?family=Source+Code+Pro:500" rel="stylesheet" type="text/css">
-
-        <link rel="stylesheet" href="highlight.css">
-        <link rel="stylesheet" href="tomorrow-night.css">
-        <link rel="stylesheet" href="ayu-highlight.css">
-
-        <!-- Custom theme stylesheets -->
-        {{#each additional_css}}
-        <link rel="stylesheet" href="{{this}}">
-        {{/each}}
-    </head>
-    <body class="light">
-        <div id="page-wrapper" class="page-wrapper">
-            <div class="page">
-                {{> header}}
-                <div id="content" class="content">
-                    <main>
-                        {{{ content }}}
-                    </main>
-                </div>
-            </div>
-        </div>
-    </body>
-</html>
