forgot to remove a cfg(not(bootstrap))

Author: pietroalbini

library/std/src/lib.rs

@@ -247,7 +247,7 @@
 #![feature(doc_cfg)]
 #![feature(doc_keyword)]
 #![feature(doc_masked)]
-#![cfg_attr(not(bootstrap), feature(doc_spotlight))]
+#![feature(doc_spotlight)]
 #![feature(dropck_eyepatch)]
 #![feature(duration_constants)]
 #![feature(exact_size_is_empty)]