Fix a couple of warnings

src/context/context.rs

@@ -1,4 +1,4 @@
-use alloc::{borrow::Cow, sync::Arc, vec::Vec};
+use alloc::{sync::Arc, vec::Vec};
 use arrayvec::ArrayString;
 use core::{
     mem::{self, size_of},
@@ -26,7 +26,6 @@ use crate::syscall::error::{Error, Result, EAGAIN, ESRCH};
 
 use super::{
     empty_cr3,
-    file::FileDescription,
     memory::{AddrSpaceWrapper, GrantFileRef},
 };
 

src/context/mod.rs

@@ -4,7 +4,7 @@
 
 use core::num::NonZeroUsize;
 
-use alloc::{borrow::Cow, collections::BTreeSet, sync::Arc};
+use alloc::{collections::BTreeSet, sync::Arc};
 
 use spin::{RwLock, RwLockReadGuard, RwLockWriteGuard};
 use spinning_top::RwSpinlock;

src/scheme/proc.rs

@@ -28,7 +28,6 @@ use alloc::{
     sync::{Arc, Weak},
     vec::Vec,
 };
-use arrayvec::ArrayString;
 use core::{
     mem::{self, size_of},
     num::NonZeroUsize,
@@ -253,7 +252,7 @@ impl ProcScheme {
         &self,
         ty: OpenTy,
         operation_str: Option<&str>,
-        flags: usize,
+        _flags: usize,
     ) -> Result<(usize, InternalFlags)> {
         let operation_name = operation_str.ok_or(Error::new(EINVAL))?;
         let (mut handle, positioned) = match ty {
@@ -535,7 +534,7 @@ impl KernelScheme for ProcScheme {
         id: usize,
         buf: UserSliceWo,
         offset: u64,
-        read_flags: u32,
+        _read_flags: u32,
         _stored_flags: u32,
     ) -> Result<usize> {
         // Don't hold a global lock during the context switch later on

src/syscall/fs.rs

@@ -1,5 +1,5 @@
 //! Filesystem syscalls
-use core::{mem::size_of, num::NonZeroUsize};
+use core::num::NonZeroUsize;
 
 use alloc::{sync::Arc, vec::Vec};
 use redox_path::RedoxPath;