2 files changed, 0 insertions, 6 deletions
diff --git a/src/librustc_codegen_utils/codegen_backend.rs b/src/librustc_codegen_utils/codegen_backend.rs
index 7a7a50a25fa..262cfb1658e 100644
--- a/src/librustc_codegen_utils/codegen_backend.rs
+++ b/src/librustc_codegen_utils/codegen_backend.rs
@@ -5,8 +5,6 @@
 //! This API is completely unstable and subject to change.
 
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
-#![deny(warnings)]
-#![feature(box_syntax)]
 
 use std::any::Any;
 use std::sync::mpsc;
diff --git a/src/librustc_codegen_utils/lib.rs b/src/librustc_codegen_utils/lib.rs
index f38b672afd9..4ea375b59b2 100644
--- a/src/librustc_codegen_utils/lib.rs
+++ b/src/librustc_codegen_utils/lib.rs
@@ -10,15 +10,11 @@
 #![feature(core_intrinsics)]
 #![feature(never_type)]
 #![feature(nll)]
-#![allow(unused_attributes)]
 #![feature(rustc_diagnostic_macros)]
 #![feature(in_band_lifetimes)]
 
 #![recursion_limit="256"]
 
-#![deny(rust_2018_idioms)]
-#![deny(unused_lifetimes)]
-
 #[macro_use]
 extern crate rustc;