diff --git a/src/main.rs b/src/main.rs
index 847a8ae..719053a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,8 +1,3 @@
-// trait_upcasting - https://github.com/rust-lang/rust/issues/65991
-// stabilization in progress
-#![feature(trait_upcasting)]
-#![feature(coerce_unsized)]
-
 mod ast;
 mod builtins;
 mod compiler;