User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36

Steps to reproduce:

I reviewed the selector parsing code and noticed that the 'outer_loop label
is still present even though the nested loop structure that previously
required it has been removed.

Actual results:

The code still uses a labeled loop ('outer_loop) and explicit
break 'outer_loop; statements, even though a plain break; would have the
same effect.

Expected results:

Since the parser no longer contains a nested loop that requires breaking out
of an outer scope, the 'outer_loop label should be removed, and
break 'outer_loop; should be replaced with a plain break;.

The selector parser previously relied on a labeled 'outer_loop to break out
of nested loops when parsing combinators.

After recent refactoring, the nested loop structure no longer exists, and all
break statements target the same loop. As a result, the 'outer_loop label and
the labeled break 'outer_loop; are redundant.

This change removes the unused loop label and replaces the labeled break with a
plain break;, simplifying the control flow without changing behavior.

https://hg.mozilla.org/mozilla-central/rev/6b240d84d1c7