Fix warnings: unused

accounts/ethstore/src/accounts_dir/disk.rs

@@ -72,7 +72,6 @@ pub fn find_unique_filename_using_random_suffix(
 /// Create a new file and restrict permissions to owner only. It errors if the file already exists.
 #[cfg(unix)]
 pub fn create_new_file_with_permissions_to_owner(file_path: &Path) -> io::Result<fs::File> {
-    use libc;
     use std::os::unix::fs::OpenOptionsExt;
 
     fs::OpenOptions::new()
@@ -94,7 +93,6 @@ pub fn create_new_file_with_permissions_to_owner(file_path: &Path) -> io::Result
 /// Create a new file and restrict permissions to owner only. It replaces the existing file if it already exists.
 #[cfg(unix)]
 pub fn replace_file_with_permissions_to_owner(file_path: &Path) -> io::Result<fs::File> {
-    use libc;
     use std::os::unix::fs::PermissionsExt;
 
     let file = fs::File::create(file_path)?;

accounts/ethstore/src/ethstore.rs

@@ -17,7 +17,6 @@
 use parking_lot::{Mutex, RwLock};
 use std::{
     collections::{BTreeMap, HashMap},
-    mem,
     num::NonZeroU32,
     path::PathBuf,
     time::{Duration, Instant},
@@ -454,7 +453,7 @@ impl EthMultiStore {
             }
         }
 
-        mem::replace(&mut *cache, new_accounts);
+        *cache = new_accounts;
         Ok(())
     }