Remove our fork of forkjoin. Java 8 bundles it.

Provide deprecated compatibility stubs for the types and static members,
which forward as follows:

```
scala.concurrent.forkjoin.ForkJoinPool         => java.util.concurrent.ForkJoinPool
scala.concurrent.forkjoin.ForkJoinTask         => java.util.concurrent.ForkJoinTask
scala.concurrent.forkjoin.ForkJoinWorkerThread => java.util.concurrent.ForkJoinWorkerThread
scala.concurrent.forkjoin.LinkedTransferQueue  => java.util.concurrent.LinkedTransferQueue
scala.concurrent.forkjoin.RecursiveAction      => java.util.concurrent.RecursiveAction
scala.concurrent.forkjoin.RecursiveTask        => java.util.concurrent.RecursiveTask
scala.concurrent.forkjoin.ThreadLocalRandom    => java.util.concurrent.ThreadLocalRandom
```

To prepare for Java 9, the Scala library does not itself use `sun.misc.Unsafe`.
However, for now, it provide a convenience accessor for it
via `scala.concurrent.util.Unsafe`. This (deprecated) class will
be removed as soon as the eco-system drops its use
(akka-actor, I'm looking at you).

1 files changed, 1 insertions, 2 deletions

diff --git a/src/library/scala/concurrent/impl/ExecutionContextImpl.scala b/src/library/scala/concurrent/impl/ExecutionContextImpl.scala
index 0c7f98ce5a..c98746a98d 100644
--- a/src/library/scala/concurrent/impl/ExecutionContextImpl.scala
+++ b/src/library/scala/concurrent/impl/ExecutionContextImpl.scala
@@ -10,10 +10,9 @@ package scala.concurrent.impl
 
 
 
-import java.util.concurrent.{ LinkedBlockingQueue, Callable, Executor, ExecutorService, Executors, ThreadFactory, TimeUnit, ThreadPoolExecutor }
+import java.util.concurrent.{ ForkJoinPool, ForkJoinWorkerThread, ForkJoinTask, LinkedBlockingQueue, Callable, Executor, ExecutorService, Executors, ThreadFactory, TimeUnit, ThreadPoolExecutor }
 import java.util.concurrent.atomic.AtomicInteger
 import java.util.Collection
-import scala.concurrent.forkjoin._
 import scala.concurrent.{ BlockContext, ExecutionContext, Awaitable, CanAwait, ExecutionContextExecutor, ExecutionContextExecutorService }
 import scala.util.control.NonFatal
 import scala.annotation.tailrec