[Perl/perl5] 60c373: qr/\K*/ now works without hanging; rmv check

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 60c3737a8ae6b878a89eaa470cda07c95d83fe9c
      
https://github.com/Perl/perl5/commit/60c3737a8ae6b878a89eaa470cda07c95d83fe9c
  Author: Karl Williamson <k...@cpan.org>
  Date:   2022-07-08 (Fri, 08 Jul 2022)

  Changed paths:
    M pod/perldiag.pod
    M regcomp.c
    M t/re/re_tests

  Log Message:
  -----------
  qr/\K*/ now works without hanging; rmv check

This removes the diagnostic that was put into place to forbid saying
\K*, and similar, as the code now handles the case reasonably.