[phobos] [D-Programming-Language/phobos] c6ebf4: revert pull #1667

[GitHub]

  Branch: refs/heads/2.064
  Home:   https://github.com/D-Programming-Language/phobos
  Commit: c6ebf419b87a2e68c12911afc15cad9fbf1b4334
      https://github.com/D-Programming-Language/phobos/commit/c6ebf419b87a2e68c12911afc15cad9fbf1b4334
  Author: Walter Bright <walter at walterbright.com>
  Date:   2013-10-27 (Sun, 27 Oct 2013)

  Changed paths:
    M std/variant.d

  Log Message:
  -----------
  revert pull #1667