Update #[cfg(bootstrap)]

Author: cuviper

src/lib.rs

@@ -17,7 +17,7 @@
 #![feature(derive_coerce_pointee)]
 #![feature(arbitrary_self_types)]
 #![feature(iter_advance_by)]
-#![cfg_attr(not(bootstrap), feature(duration_from_nanos_u128))]
+#![feature(duration_from_nanos_u128)]
 // Configure clippy and other lints
 #![allow(
     clippy::collapsible_else_if,