lints: remove unused imports reported by nightly Rust

Part of #11950

src/autoload.rs

@@ -490,7 +490,6 @@ fn test_autoload() {
     let _cleanup = test_init();
     use crate::common::{charptr2wcstring, wcs2zstring};
     use crate::fds::wopen_cloexec;
-    use crate::wutil::sprintf;
     use nix::fcntl::OFlag;
 
     macro_rules! run {

src/builtins/jobs.rs

@@ -11,7 +11,7 @@
 use crate::wutil::wgettext;
 use crate::{
     wchar::{wstr, WString, L},
-    wutil::{fish_wcstoi, sprintf, wgettext_fmt},
+    wutil::{fish_wcstoi, wgettext_fmt},
 };
 use std::num::NonZeroU32;
 

src/complete.rs

@@ -14,7 +14,7 @@
     common::charptr2wcstring,
     reader::{get_quote, is_backslashed},
     util::wcsfilecmp,
-    wutil::{localizable_string, sprintf, LocalizableString},
+    wutil::{localizable_string, LocalizableString},
 };
 use bitflags::bitflags;
 use once_cell::sync::Lazy;

src/function.rs

@@ -13,7 +13,7 @@
 use crate::parser::Parser;
 use crate::parser_keywords::parser_keywords_is_reserved;
 use crate::wchar::prelude::*;
-use crate::wutil::{dir_iter::DirIter, sprintf};
+use crate::wutil::dir_iter::DirIter;
 use once_cell::sync::Lazy;
 use std::collections::{HashMap, HashSet};
 use std::num::NonZeroU32;

src/wutil/printf.rs

@@ -51,8 +51,6 @@ macro_rules! eprintf {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-
     // Test basic sprintf with both literals and wide strings.
     #[test]
     fn test_sprintf() {