hostid: remove test_normal superseded by test_output_format

Per review feedback, drop the weaker unanchored test_normal now that
test_output_format's fully-anchored regex covers the same ground.

tests/by-util/test_hostid.rs

@@ -5,17 +5,9 @@
 use regex::Regex;
 use uutests::new_ucmd;
 
-#[test]
-fn test_normal() {
-    let re = Regex::new(r"^[0-9a-f]{8}").unwrap();
-    new_ucmd!().succeeds().stdout_matches(&re);
-}
-
 #[test]
 fn test_output_format() {
     // Output must be exactly 8 lowercase hex digits followed by a newline.
-    // The stricter anchored regex catches outputs like "00000000garbage"
-    // that the existing test_normal regex would incorrectly accept.
     let re = Regex::new(r"^[0-9a-f]{8}\n$").unwrap();
     new_ucmd!().succeeds().stdout_matches(&re);
 }