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-rw-r--r--compiler/rustc_serialize/src/lib.rs1
1 files changed, 0 insertions, 1 deletions
diff --git a/compiler/rustc_serialize/src/lib.rs b/compiler/rustc_serialize/src/lib.rs
index c79786a839f..b31fbab20ac 100644
--- a/compiler/rustc_serialize/src/lib.rs
+++ b/compiler/rustc_serialize/src/lib.rs
@@ -9,7 +9,6 @@ Core encoding and decoding interfaces.
     html_playground_url = "https://play.rust-lang.org/",
     test(attr(allow(unused_variables), deny(warnings)))
 )]
-#![feature(box_syntax)]
 #![feature(never_type)]
 #![feature(nll)]
 #![feature(associated_type_bounds)]