ls,wc: remove unnecessary unsafe blocks

src/uu/ls/src/ls.rs

@@ -3179,8 +3179,8 @@ fn display_len_or_rdev(metadata: &Metadata, config: &Config) -> SizeOrDeviceId {
         if ft.is_char_device() || ft.is_block_device() {
             // A type cast is needed here as the `dev_t` type varies across OSes.
             let dev = metadata.rdev() as dev_t;
-            let major = unsafe { major(dev) };
-            let minor = unsafe { minor(dev) };
+            let major = major(dev);
+            let minor = minor(dev);
             return SizeOrDeviceId::Device(major.to_string(), minor.to_string());
         }
     }

src/uu/wc/src/count_fast.rs

@@ -51,7 +51,7 @@ fn count_bytes_using_splice(fd: &impl AsFd) -> Result<usize, usize> {
     let null_rdev = stat::fstat(null_file.as_raw_fd())
         .map_err(|_| 0_usize)?
         .st_rdev as libc::dev_t;
-    if unsafe { (libc::major(null_rdev), libc::minor(null_rdev)) } != (1, 3) {
+    if (libc::major(null_rdev), libc::minor(null_rdev)) != (1, 3) {
         // This is not a proper /dev/null, writing to it is probably bad
         // Bit of an edge case, but it has been known to happen
         return Err(0);

tests/by-util/test_ls.rs

@@ -4407,7 +4407,7 @@ fn test_device_number() {
     let blk_dev_path = blk_dev.path();
     let blk_dev_meta = metadata(blk_dev_path.as_path()).unwrap();
     let blk_dev_number = blk_dev_meta.rdev() as dev_t;
-    let (major, minor) = unsafe { (major(blk_dev_number), minor(blk_dev_number)) };
+    let (major, minor) = (major(blk_dev_number), minor(blk_dev_number));
     let major_minor_str = format!("{major}, {minor}");
 
     let scene = TestScenario::new(util_name!());