test(compare): remove outdated comment

Follow-up of rust-lang#14161 (comment)

Author: choznerol

crates/cargo-test-support/src/compare.rs

@@ -201,10 +201,6 @@ fn add_common_redactions(subs: &mut snapbox::Redactions) {
     )
     .unwrap();
 
-    // Following 3 subs redact:
-    //   "1719325877.527949100s, 61549498ns after last build at 1719325877.466399602s"
-    //   "1719503592.218193216s, 1h 1s after last build at 1719499991.982681034s"
-    // into "[DIRTY_REASON_NEW_TIME], [DIRTY_REASON_DIFF] after last build at [DIRTY_REASON_OLD_TIME]"
     subs.insert(
         "[TIME_DIFF_AFTER_LAST_BUILD]",
         regex!(r"(?<redacted>[0-9]+(\.[0-9]+)?s, (\s?[0-9]+(\.[0-9]+)?(s|ns|h))+ after last build at [0-9]+(\.[0-9]+)?s)"),