[perl6/specs] 2b89a4: Remove Channel.peek, it is too dangerous

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/perl6/specs
  Commit: 2b89a45c0df7ed02c51d502735ab9f17f89964df
      
https://github.com/perl6/specs/commit/2b89a45c0df7ed02c51d502735ab9f17f89964df
  Author: Elizabeth Mattijsen <l...@dijkmat.nl>
  Date:   2013-11-17 (Sun, 17 Nov 2013)

  Changed paths:
    M S17-concurrency.pod

  Log Message:
  -----------
  Remove Channel.peek, it is too dangerous

And a remnant from Thread times.