Fix some warnings

Author: IsaacWoods

src/aml/namespace.rs

@@ -1,9 +1,8 @@
 use super::object::WrappedObject;
-use crate::aml::{AmlError, object::Object};
+use crate::aml::AmlError;
 use alloc::{
     collections::btree_map::BTreeMap,
     string::{String, ToString},
-    sync::Arc,
     vec,
     vec::Vec,
 };

src/aml/object.rs

@@ -160,7 +160,7 @@ impl Object {
         }
     }
 
-    pub fn as_string(&self) -> Result<Cow<str>, AmlError> {
+    pub fn as_string(&self) -> Result<Cow<'_, str>, AmlError> {
         if let Object::String(value) = self {
             Ok(Cow::from(value))
         } else {

src/lib.rs

@@ -32,7 +32,7 @@
 //! interfaces, such as [`PlatformInfo`], [`PciConfigRegions`], or [`HpetInfo`].
 
 #![no_std]
-#![feature(allocator_api, let_chains, inherent_str_constructors)]
+#![feature(allocator_api, let_chains)]
 
 #[cfg_attr(test, macro_use)]
 #[cfg(test)]