Artifact feature seems to dead code?

It seems the aftifact feature is dead code.

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---

regression: https://github.com/openai/codex/pull/15851

diff --git a/codex-rs/config/src/schema.rs b/codex-rs/config/src/schema.rs
index 91aa50add..3d908051d 100644
--- a/codex-rs/config/src/schema.rs
+++ b/codex-rs/config/src/schema.rs
@@ -22,9 +22,6 @@ pub fn features_schema(schema_gen: &mut SchemaGenerator) -> Schema {
 
     let mut validation = ObjectValidation::default();
     for feature in FEATURES {
-        if feature.id == codex_features::Feature::Artifact {
-            continue;
-        }
         if feature.id == codex_features::Feature::MultiAgentV2 {
             validation.properties.insert(
                 feature.key.to_string(),
diff --git a/codex-rs/features/src/lib.rs b/codex-rs/features/src/lib.rs
index 10d5fdf88..42e162236 100644
--- a/codex-rs/features/src/lib.rs
+++ b/codex-rs/features/src/lib.rs
@@ -170,8 +170,6 @@ pub enum Feature {
     ToolCallMcpElicitation,
     /// Enable personality selection in the TUI.
     Personality,
-    /// Enable native artifact tools.
-    Artifact,
     /// Enable Fast mode selection in the TUI and request layer.
     FastMode,
     /// Enable experimental realtime voice conversation mode in the TUI.
@@ -851,12 +849,6 @@ pub const FEATURES: &[FeatureSpec] = &[
         stage: Stage::Stable,
         default_enabled: true,
     },
-    FeatureSpec {
-        id: Feature::Artifact,
-        key: "artifact",
-        stage: Stage::UnderDevelopment,
-        default_enabled: false,
-    },
     FeatureSpec {
         id: Feature::FastMode,
         key: "fast_mode",