diff --git a/src/lib.rs b/src/lib.rs
index 581da0976e..aadbb0270d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -8,9 +8,6 @@
 #![warn(rust_2018_idioms)]
 #![allow(clippy::cast_lossless)]
 
-#![allow(incomplete_features)]
-#![feature(const_generics)]
-
 extern crate rustc_attr;
 extern crate rustc_apfloat;
 extern crate rustc_ast;