[nomerge] remove unused import.

Author: takayahilton

library/src/scala/collection/mutable/WrappedArray.scala

@@ -15,7 +15,6 @@ package collection
 package mutable
 
 import scala.reflect.ClassTag
-import scala.runtime.BoxedUnit
 import scala.collection.generic._
 import scala.collection.parallel.mutable.ParArray
 import scala.util.hashing.MurmurHash3

library/src/scala/concurrent/impl/ExecutionContextImpl.scala

@@ -12,8 +12,8 @@
 
 package scala.concurrent.impl
 
-import java.util.concurrent.{ ForkJoinPool, ForkJoinWorkerThread, ForkJoinTask, Callable, Executor, ExecutorService, ThreadFactory, TimeUnit }
-import java.util.concurrent.atomic.{AtomicInteger, AtomicReference}
+import java.util.concurrent.{ ForkJoinPool, ForkJoinWorkerThread, Callable, Executor, ExecutorService, ThreadFactory, TimeUnit }
+import java.util.concurrent.atomic.AtomicInteger
 import java.util.Collection
 import scala.concurrent.{ BlockContext, ExecutionContext, CanAwait, ExecutionContextExecutor, ExecutionContextExecutorService }
 import scala.annotation.tailrec