message: StarlarkValue doesn't need erased_serde::Serialize
  Summary: Dead code, and prevents some other following changes.
diff: @@ -693,8 +693,6 @@ pub trait StarlarkValue<'v>: 'v + AnyLifetime<'v> + Debug + Display + Serialize
  }
  }
  -erased_serde::serialize_trait_object!(<'v> StarlarkValue<'v>);
  -
  /// Trait implemented by a value stored in arena which delegates
  /// it's operations to contained [`StarlarkValue`].
  pub(crate) trait StarlarkValueDyn<'v>: 'v + Serialize {
  @@ -784,5 +782,3 @@ pub(crate) trait StarlarkValueDyn<'v>: 'v + Serialize {
  fn set_at(&self, _index: Value<'v>, _new_value: Value<'v>) -> anyhow::Result<()>;
  fn set_attr(&self, _attribute: &str, _new_value: Value<'v>) -> anyhow::Result<()>;
  }
  -
  -erased_serde::serialize_trait_object!(<'v> StarlarkValueDyn<'v>);
  