remove cfg(bootstrap)

src/librustdoc/lib.rs

@@ -9,14 +9,12 @@
 #![feature(control_flow_enum)]
 #![feature(drain_filter)]
 #![feature(let_chains)]
-#![cfg_attr(bootstrap, feature(let_else))]
 #![feature(test)]
 #![feature(never_type)]
 #![feature(once_cell)]
 #![feature(type_ascription)]
 #![feature(iter_intersperse)]
 #![feature(type_alias_impl_trait)]
-#![cfg_attr(bootstrap, feature(generic_associated_types))]
 #![recursion_limit = "256"]
 #![warn(rustc::internal)]
 #![allow(clippy::collapsible_if, clippy::collapsible_else_if)]