From 00b7d70710aa34e495a91727fe3e5bd7f97ae55e Mon Sep 17 00:00:00 2001
From: Michael Howell <michael@notriddle.com>
Date: Thu, 7 Sep 2023 13:05:30 -0700
Subject: [PATCH] rustdoc: remove unused ID `mainThemeStyle`

This was added in 003b2bc1c65251ec2fc80b78ed91c43fb35402ec and used to build
the URL of the theme stylesheets. It isn't used any more, because
f9e1f6ffdf03ec33cb29e20c88fc7bcc938c7f42 changed it so that the URL was
supplied in a `<meta>` tag, which also provides the hashes of the files.
---
 src/librustdoc/html/markdown.rs         | 1 -
 src/librustdoc/html/templates/page.html | 3 +--
 2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/librustdoc/html/markdown.rs b/src/librustdoc/html/markdown.rs
index 98cc38a10d4..a8d85fb6fb4 100644
--- a/src/librustdoc/html/markdown.rs
+++ b/src/librustdoc/html/markdown.rs
@@ -1574,7 +1574,6 @@ fn init_id_map() -> FxHashMap<Cow<'static, str>, usize> {
     map.insert("crate-search-div".into(), 1);
     // This is the list of IDs used in HTML generated in Rust (including the ones
     // used in tera template files).
-    map.insert("mainThemeStyle".into(), 1);
     map.insert("themeStyle".into(), 1);
     map.insert("settings-menu".into(), 1);
     map.insert("help-button".into(), 1);
diff --git a/src/librustdoc/html/templates/page.html b/src/librustdoc/html/templates/page.html
index 60ccfe4da44..8cb43634377 100644
--- a/src/librustdoc/html/templates/page.html
+++ b/src/librustdoc/html/templates/page.html
@@ -15,8 +15,7 @@
     <link rel="stylesheet" {#+ #}
           href="{{static_root_path|safe}}{{files.normalize_css}}"> {# #}
     <link rel="stylesheet" {#+ #}
-          href="{{static_root_path|safe}}{{files.rustdoc_css}}" {#+ #}
-          id="mainThemeStyle"> {# #}
+          href="{{static_root_path|safe}}{{files.rustdoc_css}}"> {# #}
     {% if !layout.default_settings.is_empty() %}
     <script id="default-settings" {#+ #}
       {%~ for (k, v) in layout.default_settings ~%}