Unbreak mdbook.

ltratt · ltratt · commit daba77d43624 · 2025-12-02T09:40:39.000Z
diff --git a/doc/book.toml b/doc/book.toml
@@ -1,5 +1,4 @@
 [book]
 authors = ["Lukas Diekmann", "Laurence Tratt"]
-multilingual = false
 src = "src"
 title = "grmtools"
