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-rw-r--r--compiler/rustc_feature/src/active.rs2
1 files changed, 0 insertions, 2 deletions
diff --git a/compiler/rustc_feature/src/active.rs b/compiler/rustc_feature/src/active.rs
index 2fa7bceb8bc..c893b34b4ac 100644
--- a/compiler/rustc_feature/src/active.rs
+++ b/compiler/rustc_feature/src/active.rs
@@ -200,8 +200,6 @@ declare_features! (
     (active, auto_traits, "1.50.0", Some(13231), None),
     /// Allows using `box` in patterns (RFC 469).
     (active, box_patterns, "1.0.0", Some(29641), None),
-    /// Allows using the `box $expr` syntax.
-    (active, box_syntax, "1.0.0", Some(49733), None),
     /// Allows `#[doc(notable_trait)]`.
     /// Renamed from `doc_spotlight`.
     (active, doc_notable_trait, "1.52.0", Some(45040), None),