Prepare for mdbook 0.5

ehuss · ehuss · commit 0ba9ba7db86b · 2025-10-26T14:47:09.000-07:00
The `multilingual` field has been removed in mdbook 0.5. Additionally
this removes the unnecessary `src` value which defaults to the same
value.
diff --git a/book/book.toml b/book/book.toml
@@ -1,8 +1,6 @@
 [book]
 authors = ["The Rust Clippy Developers"]
 language = "en"
-multilingual = false
-src = "src"
 title = "Clippy Documentation"
 
 [rust]
