Remove unused auto_traits feature gate

bjorn3 · bjorn3 · commit e85722946af6 · 2022-03-25T17:24:27.000+01:00
diff --git a/library/proc_macro/src/lib.rs b/library/proc_macro/src/lib.rs
@@ -26,7 +26,6 @@
 #![feature(decl_macro)]
 #![feature(extern_types)]
 #![feature(negative_impls)]
-#![feature(auto_traits)]
 #![feature(restricted_std)]
 #![feature(rustc_attrs)]
 #![feature(min_specialization)]
