diff --git a/src/tools/rust-analyzer/docs/book/book.toml b/src/tools/rust-analyzer/docs/book/book.toml
index a6f6a6ed784d..5ca4badde874 100644
--- a/src/tools/rust-analyzer/docs/book/book.toml
+++ b/src/tools/rust-analyzer/docs/book/book.toml
@@ -34,8 +34,3 @@ use-boolean-and = true
 [output.html.fold]
 enable = true
 level = 3
-
-[preprocessor.toc]
-command = "mdbook-toc"
-renderer = ["html"]
-max-level = 3