[Perl/perl5] 1c4adc: locale.c: Don't compile unused function

[Karl Williamson via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 1c4adc26f5bdb3ba84ab28c4643ace7a2c3b5c3e
      
https://github.com/Perl/perl5/commit/1c4adc26f5bdb3ba84ab28c4643ace7a2c3b5c3e
  Author: Karl Williamson <k...@cpan.org>
  Date:   2024-02-05 (Mon, 05 Feb 2024)

  Changed paths:
    M embed.fnc
    M embed.h
    M locale.c
    M proto.h

  Log Message:
  -----------
  locale.c: Don't compile unused function

Since 60e050beb2e45ebd7ead7f1bf93f845b23c474b5, this function is no
longer called if -DNO_LOCALE has been specified.  Don't compile it when
not called.