Use SmartString in parsing.

src/ast/flags.rs

@@ -4,15 +4,6 @@ use bitflags::bitflags;
 #[cfg(feature = "no_std")]
 use std::prelude::v1::*;
 
-/// A type representing the access mode of a function.
-#[derive(Debug, Clone, Copy, Eq, PartialEq, Ord, PartialOrd, Hash)]
-pub enum FnAccess {
-    /// Private function.
-    Private,
-    /// Public function.
-    Public,
-}
-
 bitflags! {
     /// _(internals)_ A type that holds a configuration option with bit-flags.
     /// Exported under the `internals` feature only.