wutil: libc::unlink -> std::fs::remove_file

Part of #12380

src/fs.rs

@@ -478,7 +478,7 @@ fn try_rewriting<F, UserData>(
             .as_ref()
             .is_ok_and(|(_file_id, potential_update)| !potential_update.do_save)
     {
-        wunlink(&tmp_name);
+        let _ = wunlink(&tmp_name);
     }
     result
 }

src/history/history.rs

@@ -831,7 +831,7 @@ fn clear(&mut self) {
         self.first_unwritten_new_item_index = 0;
         self.file_contents = None;
         if let Ok(Some(filename)) = self.history_file_path() {
-            wunlink(&filename);
+            let _ = wunlink(&filename);
         }
         self.clear_file_state();
     }

src/wutil/mod.rs

@@ -59,9 +59,9 @@ pub fn waccess(file_name: &wstr, mode: libc::c_int) -> libc::c_int {
 }
 
 /// Wide character version of unlink().
-pub fn wunlink(file_name: &wstr) -> libc::c_int {
-    let tmp = wcs2zstring(file_name);
-    unsafe { libc::unlink(tmp.as_ptr()) }
+pub fn wunlink(file_name: &wstr) -> io::Result<()> {
+    let tmp = wcs2osstring(file_name);
+    fs::remove_file(tmp)
 }
 
 pub fn wperror(s: &wstr) {