2 files changed, 0 insertions, 7 deletions
diff --git a/src/libsyntax/feature_gate/check.rs b/src/libsyntax/feature_gate/check.rs
index b5dc7d4db2b..c53f5f41e32 100644
--- a/src/libsyntax/feature_gate/check.rs
+++ b/src/libsyntax/feature_gate/check.rs
@@ -150,12 +150,6 @@ fn leveled_feature_err<'a, S: Into<MultiSpan>>(
 const EXPLAIN_BOX_SYNTAX: &str =
     "box expression syntax is experimental; you can call `Box::new` instead";
 
-pub const EXPLAIN_STMT_ATTR_SYNTAX: &str =
-    "attributes on expressions are experimental";
-
-pub const EXPLAIN_UNSIZED_TUPLE_COERCION: &str =
-    "unsized tuple coercion is not stable enough for use and is subject to change";
-
 struct PostExpansionVisitor<'a> {
     parse_sess: &'a ParseSess,
     features: &'a Features,
diff --git a/src/libsyntax/lib.rs b/src/libsyntax/lib.rs
index 9db2007ea9c..fda95374f64 100644
--- a/src/libsyntax/lib.rs
+++ b/src/libsyntax/lib.rs
@@ -97,7 +97,6 @@ pub mod feature_gate {
     pub use check::{
         check_crate, check_attribute, get_features, feature_err, emit_feature_err,
         GateIssue, UnstableFeatures,
-        EXPLAIN_STMT_ATTR_SYNTAX, EXPLAIN_UNSIZED_TUPLE_COERCION,
     };
 }
 pub mod mut_visit;