remove unused imports

Author: lrytz

core/src/main/scala/scala/collection/parallel/CollectionConverters.scala

@@ -10,7 +10,7 @@ package scala.collection.parallel
 
 import scala.language.implicitConversions
 import scala.{collection => sc}
-import scala.collection.{mutable => scm, immutable => sci, concurrent => scc, generic => scg}
+import scala.collection.{mutable => scm, immutable => sci, concurrent => scc}
 
 import scala.collection._
 

core/src/main/scala/scala/collection/parallel/ParIterableLike.scala

@@ -15,7 +15,6 @@ import scala.collection.mutable.Builder
 import scala.collection.mutable.ArrayBuffer
 import scala.collection.IterableLike
 import scala.collection.Parallel
-import scala.collection.Parallelizable
 import scala.collection.CustomParallelizable
 import scala.collection.generic._
 import scala.collection.GenIterableLike

core/src/main/scala/scala/collection/parallel/TaskSupport.scala

@@ -9,7 +9,6 @@
 package scala
 package collection.parallel
 
-import java.util.concurrent.ThreadPoolExecutor
 import java.util.concurrent.ForkJoinPool
 import scala.concurrent.ExecutionContext
 

core/src/main/scala/scala/collection/parallel/Tasks.scala

@@ -9,7 +9,6 @@
 package scala
 package collection.parallel
 
-import java.util.concurrent.ThreadPoolExecutor
 import java.util.concurrent.{ForkJoinPool, RecursiveAction, ForkJoinWorkerThread}
 import scala.concurrent.ExecutionContext
 import scala.util.control.Breaks._