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-rw-r--r--src/libsyntax_ext/error_codes.rs2
-rw-r--r--src/libsyntax_ext/lib.rs3
2 files changed, 0 insertions, 5 deletions
diff --git a/src/libsyntax_ext/error_codes.rs b/src/libsyntax_ext/error_codes.rs
index 9ec551b4395..5982a4df226 100644
--- a/src/libsyntax_ext/error_codes.rs
+++ b/src/libsyntax_ext/error_codes.rs
@@ -1,5 +1,3 @@
-#![allow(non_snake_case)]
-
 use syntax::register_long_diagnostics;
 
 // Error messages for EXXXX errors.
diff --git a/src/libsyntax_ext/lib.rs b/src/libsyntax_ext/lib.rs
index fae884860ed..da11f2ff23f 100644
--- a/src/libsyntax_ext/lib.rs
+++ b/src/libsyntax_ext/lib.rs
@@ -3,9 +3,6 @@
 
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
 
-#![deny(rust_2018_idioms)]
-#![deny(unused_lifetimes)]
-
 #![feature(crate_visibility_modifier)]
 #![feature(decl_macro)]
 #![feature(mem_take)]