Nightly clippy fixes

There are a few additionaly warnings because of
rust-lang/rust-clippy#12377, which is a
nightly-only bug that will hopefully be fixed.

cli/src/cli_util.rs

@@ -73,7 +73,6 @@ use jj_lib::workspace::{
 use jj_lib::{dag_walk, file_util, git, op_walk, revset};
 use once_cell::unsync::OnceCell;
 use thiserror::Error;
-use toml_edit;
 use tracing::instrument;
 use tracing_chrome::ChromeLayerBuilder;
 use tracing_subscriber::prelude::*;

cli/src/merge_tools/builtin.rs

@@ -558,7 +558,6 @@ mod tests {
     use jj_lib::conflicts::extract_as_single_hunk;
     use jj_lib::merge::MergedTreeValue;
     use jj_lib::repo::Repo;
-    use pollster::FutureExt;
     use testutils::TestRepo;
 
     use super::*;

lib/src/backend.rs

@@ -18,9 +18,7 @@ use std::any::Any;
 use std::collections::BTreeMap;
 use std::fmt::Debug;
 use std::io::Read;
-use std::result::Result;
 use std::time::SystemTime;
-use std::vec::Vec;
 
 use async_trait::async_trait;
 use thiserror::Error;

lib/src/content_hash.rs

@@ -149,8 +149,6 @@ where
 mod tests {
     use std::collections::{BTreeMap, HashMap};
 
-    use blake2::Blake2b512;
-
     use super::*;
 
     #[test]

lib/src/default_index/revset_engine.rs

@@ -1090,7 +1090,6 @@ fn has_diff_from_parent(
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::backend::{ChangeId, CommitId};
     use crate::default_index::DefaultMutableIndex;
 
     /// Generator of unique 16-byte ChangeId excluding root id

lib/src/git_backend.rs

@@ -1295,7 +1295,6 @@ mod tests {
     use test_case::test_case;
 
     use super::*;
-    use crate::backend::{FileId, MillisSinceEpoch};
     use crate::content_hash::blake2b_hash;
 
     #[test_case(false; "legacy tree format")]

lib/src/id_prefix.rs

@@ -445,7 +445,6 @@ fn unwrap_as_short_key<const N: usize>(key_bytes: &[u8]) -> &[u8; N] {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::backend::ChangeId;
 
     #[derive(Clone, Copy, Eq, PartialEq)]
     struct Position(usize);

lib/src/local_backend.rs

@@ -496,7 +496,6 @@ mod tests {
     use pollster::FutureExt;
 
     use super::*;
-    use crate::backend::MillisSinceEpoch;
 
     /// Test that parents get written correctly
     #[test]

lib/src/simple_op_store.rs

@@ -685,10 +685,6 @@ mod tests {
     use maplit::{btreemap, hashmap, hashset};
 
     use super::*;
-    use crate::backend::{CommitId, MillisSinceEpoch, Timestamp};
-    use crate::content_hash::blake2b_hash;
-    use crate::object_id::ObjectId;
-    use crate::op_store::{OperationMetadata, RefTarget, WorkspaceId};
 
     fn create_view() -> View {
         let new_remote_ref = |target: &RefTarget| RemoteRef {

lib/src/ssh_signing.rs

@@ -269,7 +269,7 @@ impl SigningBackend for SshBackend {
 #[cfg(test)]
 mod tests {
     use std::fs::File;
-    use std::io::{Read, Write};
+    use std::io::Read;
 
     use super::*;