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-rw-r--r--src/libsyntax/feature_gate.rs5
1 files changed, 0 insertions, 5 deletions
diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
index 604df862dc2..709c3653b02 100644
--- a/src/libsyntax/feature_gate.rs
+++ b/src/libsyntax/feature_gate.rs
@@ -846,11 +846,6 @@ pub const BUILTIN_ATTRIBUTES: &'static [(&'static str, AttributeType, AttributeG
                                                        is just used for rustc unit tests \
                                                        and will never be stable",
                                                       cfg_fn!(rustc_attrs))),
-    ("rustc_serialize_exclude_null", Normal, Gated(Stability::Unstable,
-                                             "rustc_attrs",
-                                             "the `#[rustc_serialize_exclude_null]` attribute \
-                                              is an internal-only feature",
-                                             cfg_fn!(rustc_attrs))),
     ("rustc_synthetic", Whitelisted, Gated(Stability::Unstable,
                                                       "rustc_attrs",
                                                       "this attribute \