[Perl/perl5] 719729: t/lib/croak/class: remove skip from of leaking test

[Dagfinn Ilmari Mannsåker via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 719729c24211e22d3e22989596f4d06c062b8485
      
https://github.com/Perl/perl5/commit/719729c24211e22d3e22989596f4d06c062b8485
  Author: Dagfinn Ilmari Mannsåker <ilm...@ilmari.org>
  Date:   2023-07-21 (Fri, 21 Jul 2023)

  Changed paths:
    M t/lib/croak/class

  Log Message:
  -----------
  t/lib/croak/class: remove skip from of leaking test

The line number wasn't adjusted when the skip was added, so now that
the skipe condition is false the test fails.