Fix warnings reported by the latest version of rustc

puzzlefs-lib/src/builder.rs

@@ -522,13 +522,10 @@ pub mod tests {
     use super::*;
 
     use std::backtrace::Backtrace;
-    use std::convert::TryInto;
 
     use tempfile::tempdir;
 
-    use crate::oci::Digest;
     use crate::reader::WalkPuzzleFS;
-    use std::convert::TryFrom;
     use std::path::PathBuf;
     use tempfile::TempDir;
 

puzzlefs-lib/src/compression/zstd_seekable_wrapper.rs

@@ -1,5 +1,4 @@
 use std::cmp::min;
-use std::convert::TryFrom;
 use std::io;
 use std::io::{Read, Seek, Write};
 

puzzlefs-lib/src/extractor.rs

@@ -150,12 +150,9 @@ pub fn extract_rootfs(oci_dir: &str, tag: &str, extract_dir: &str) -> anyhow::Re
 mod tests {
     use tempfile::{tempdir, TempDir};
 
-    use std::fs;
     use std::fs::File;
 
     use crate::builder::build_test_fs;
-    use crate::oci::Image;
-    use std::collections::HashMap;
     use std::os::unix::fs::MetadataExt;
     use walkdir::WalkDir;
 

puzzlefs-lib/src/format/types.rs

@@ -4,7 +4,6 @@ use nix::errno::Errno;
 use nix::sys::stat;
 use std::backtrace::Backtrace;
 use std::collections::BTreeMap;
-use std::convert::{TryFrom, TryInto};
 use std::ffi::OsStr;
 use std::ffi::OsString;
 use std::fmt;
@@ -15,7 +14,6 @@ use std::os::unix::ffi::OsStrExt;
 use std::os::unix::ffi::OsStringExt;
 use std::os::unix::fs::{FileTypeExt, MetadataExt, PermissionsExt};
 use std::path::Path;
-use std::vec::Vec;
 
 use serde::de::Error as SerdeError;
 use serde::de::Visitor;

puzzlefs-lib/src/oci.rs

@@ -1,7 +1,6 @@
 use crate::fsverity_helpers::{check_fs_verity, get_fs_verity_digest};
 use std::any::Any;
 use std::backtrace::Backtrace;
-use std::convert::TryFrom;
 use std::fs;
 use std::io;
 use std::io::{Read, Seek};

puzzlefs-lib/src/reader/fuse.rs

@@ -1,6 +1,5 @@
 use log::{debug, warn};
 use os_pipe::PipeWriter;
-use std::convert::TryInto;
 use std::ffi::CString;
 use std::ffi::OsStr;
 use std::ffi::OsString;
@@ -680,7 +679,6 @@ mod tests {
     use std::io;
     use std::path::Path;
 
-    use hex;
     use sha2::{Digest, Sha256};
     use tempfile::tempdir;
 

puzzlefs-lib/src/reader/puzzlefs.rs

@@ -1,7 +1,6 @@
 use nix::errno::Errno;
 use std::backtrace::Backtrace;
 use std::cmp::min;
-use std::convert::TryFrom;
 use std::io;
 use std::os::unix::ffi::OsStrExt;
 use std::path::{Component, Path};
@@ -231,7 +230,6 @@ mod tests {
     use tempfile::tempdir;
 
     use crate::builder::build_test_fs;
-    use crate::oci::Image;
 
     use super::*;
 

puzzlefs-lib/src/reader/walk.rs

@@ -78,7 +78,6 @@ mod tests {
     use std::path::Path;
 
     use crate::builder::build_test_fs;
-    use crate::oci::Image;
 
     use super::*;