[Perl/perl5] 26d095: Remove non-null checks before op_free()

[Dagfinn Ilmari Mannsåker via perl5-changes]

  Branch: refs/heads/op-free-null-check
  Home:   https://github.com/Perl/perl5
  Commit: 26d0953e06df95db208cf9235257340608980cf3
      
https://github.com/Perl/perl5/commit/26d0953e06df95db208cf9235257340608980cf3
  Author: Dagfinn Ilmari Mannsåker <ilm...@ilmari.org>
  Date:   2023-09-15 (Fri, 15 Sep 2023)

  Changed paths:
    M class.c
    M op.c
    M perl.c
    M pp_ctl.c
    M toke.c

  Log Message:
  -----------
  Remove non-null checks before op_free()

The argument to op_free() is declared NULLOK, and the first thing it
does is return if the op is null or already freed, so there's no point
in callers checking for it.