Fix warnings and old names (#8457)

# Description

This fixes up some clippy warnings and removes some old names/info from
our unit tests

# User-Facing Changes

Internal changes only

# Tests + Formatting

Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A
clippy::needless_collect` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass

> **Note**
> from `nushell` you can also use the `toolkit` as follows
> ```bash
> use toolkit.nu # or use an `env_change` hook to activate it
automatically
> toolkit check pr
> ```

# After Submitting

If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.

crates/nu-command/tests/commands/rm.rs

@@ -108,7 +108,7 @@ fn removes_directory_contents_with_recursive_flag() {
     Playground::setup("rm_test_5", |dirs, sandbox| {
         sandbox.with_files(vec![
             EmptyFile("yehuda.txt"),
-            EmptyFile("jonathan.txt"),
+            EmptyFile("jttxt"),
             EmptyFile("andres.txt"),
         ]);
 
@@ -187,13 +187,13 @@ fn removes_multiple_files() {
     Playground::setup("rm_test_10", |dirs, sandbox| {
         sandbox.with_files(vec![
             EmptyFile("yehuda.txt"),
-            EmptyFile("jonathan.txt"),
+            EmptyFile("jttxt"),
             EmptyFile("andres.txt"),
         ]);
 
         nu!(
             cwd: dirs.test(),
-            "rm yehuda.txt jonathan.txt andres.txt"
+            "rm yehuda.txt jttxt andres.txt"
         );
 
         assert_eq!(
@@ -208,7 +208,7 @@ fn removes_multiple_files_with_asterisks() {
     Playground::setup("rm_test_11", |dirs, sandbox| {
         sandbox.with_files(vec![
             EmptyFile("yehuda.txt"),
-            EmptyFile("jonathan.txt"),
+            EmptyFile("jt.txt"),
             EmptyFile("andres.toml"),
         ]);
 
@@ -227,7 +227,7 @@ fn removes_multiple_files_with_asterisks() {
 #[test]
 fn allows_doubly_specified_file() {
     Playground::setup("rm_test_12", |dirs, sandbox| {
-        sandbox.with_files(vec![EmptyFile("yehuda.txt"), EmptyFile("jonathan.toml")]);
+        sandbox.with_files(vec![EmptyFile("yehuda.txt"), EmptyFile("jt.toml")]);
 
         let actual = nu!(
             cwd: dirs.test(),
@@ -247,7 +247,7 @@ fn remove_files_from_two_parents_up_using_multiple_dots_and_glob() {
     Playground::setup("rm_test_13", |dirs, sandbox| {
         sandbox.with_files(vec![
             EmptyFile("yehuda.txt"),
-            EmptyFile("jonathan.txt"),
+            EmptyFile("jt.txt"),
             EmptyFile("kevin.txt"),
         ]);
 
@@ -259,7 +259,7 @@ fn remove_files_from_two_parents_up_using_multiple_dots_and_glob() {
         );
 
         assert!(!files_exist_at(
-            vec!["yehuda.txt", "jonathan.txt", "kevin.txt"],
+            vec!["yehuda.txt", "jttxt", "kevin.txt"],
             dirs.test()
         ));
     })