[phobos] [dlang/phobos] 971da6: Remove some global imports from std.concurrency

[GitHub via phobos]

  Branch: refs/heads/master
  Home:   https://github.com/dlang/phobos
  Commit: 971da6a37ba73199696156a6ad71f526df145677
      https://github.com/dlang/phobos/commit/971da6a37ba73199696156a6ad71f526df145677
  Author: Jack Stouffer <jack at jackstouffer.com>
  Date:   2016-09-21 (Wed, 21 Sep 2016)

  Changed paths:
    M std/concurrency.d

  Log Message:
  -----------
  Remove some global imports from std.concurrency


  Commit: a54905a24cb8e969a538323ed4e6294df31e8ed7
      https://github.com/dlang/phobos/commit/a54905a24cb8e969a538323ed4e6294df31e8ed7
  Author: Ilya Yaroshenko <ilyayaroshenko at gmail.com>
  Date:   2016-09-22 (Thu, 22 Sep 2016)

  Changed paths:
    M std/concurrency.d

  Log Message:
  -----------
  Merge pull request #4807 from JackStouffer/concurrency-imports

[trivial] Remove some global imports from std.concurrency


Compare: https://github.com/dlang/phobos/compare/66f345669382...a54905a24cb8