[perl6/specs] f04f0a: Remove old S17

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/perl6/specs
  Commit: f04f0abee9e696eb01726c07c56d76497b156c85
      
https://github.com/perl6/specs/commit/f04f0abee9e696eb01726c07c56d76497b156c85
  Author: Elizabeth Mattijsen <l...@dijkmat.nl>
  Date:   2014-06-16 (Mon, 16 Jun 2014)

  Changed paths:
    R S17-concurrency-OLD.pod

  Log Message:
  -----------
  Remove old S17