Remove some dead code

src/common/aligned_box.rs

@@ -12,9 +12,6 @@ pub unsafe trait ValidForZero {}
 unsafe impl<const N: usize> ValidForZero for [u8; N] {}
 unsafe impl ValidForZero for u8 {}
 
-unsafe impl ValidForZero for crate::syscall::data::Stat {}
-unsafe impl ValidForZero for crate::syscall::data::StatVfs {}
-
 impl<T: ?Sized, const ALIGN: usize> AlignedBox<T, ALIGN> {
     fn layout(&self) -> Layout {
         layout_upgrade_align(Layout::for_value::<T>(&*self), ALIGN)

src/scheme/proc.rs

@@ -254,12 +254,6 @@ static NEXT_ID: AtomicUsize = AtomicUsize::new(1);
 // Using BTreeMap as hashbrown doesn't have a const constructor.
 static HANDLES: RwLock<BTreeMap<usize, Handle>> = RwLock::new(BTreeMap::new());
 
-#[derive(PartialEq)]
-pub enum Access {
-    OtherProcesses,
-    Restricted,
-}
-
 fn new_handle(handle: Handle) -> Result<usize> {
     let id = NEXT_ID.fetch_add(1, Ordering::Relaxed);
     let _ = HANDLES.write().insert(id, handle);