Remove unused imports and other minor cleanups

 - Language imports are preceding other imports
 - Deleted empty file: InlineErasure
 - Removed some unused private[parallel] methods in
   scala/collection/parallel/package.scala

This removes hundreds of warnings when compiling with
"-Xlint -Ywarn-dead-code -Ywarn-unused -Ywarn-unused-import".

6 files changed, 9 insertions, 17 deletions

diff --git a/src/reflect/scala/reflect/io/AbstractFile.scala b/src/reflect/scala/reflect/io/AbstractFile.scala
index bcefcc471f..ee0bc129f8 100644
--- a/src/reflect/scala/reflect/io/AbstractFile.scala
+++ b/src/reflect/scala/reflect/io/AbstractFile.scala
@@ -8,10 +8,9 @@ package scala
 package reflect
 package io
 
-import java.io.{ FileOutputStream, IOException, InputStream, OutputStream, BufferedOutputStream, ByteArrayOutputStream }
+import java.io.{ IOException, InputStream, OutputStream, BufferedOutputStream, ByteArrayOutputStream }
 import java.io.{ File => JFile }
 import java.net.URL
-import scala.collection.mutable.ArrayBuffer
 import scala.reflect.internal.util.Statistics
 
 /**
diff --git a/src/reflect/scala/reflect/io/File.scala b/src/reflect/scala/reflect/io/File.scala
index a9c6807e88..206861adb3 100644
--- a/src/reflect/scala/reflect/io/File.scala
+++ b/src/reflect/scala/reflect/io/File.scala
@@ -6,20 +6,16 @@
 **                          |/                                          **
 \*                                                                      */
 
-
 package scala
 package reflect
 package io
 
 import java.io.{
-  FileInputStream, FileOutputStream, BufferedReader, BufferedWriter, InputStreamReader, OutputStreamWriter,
-  BufferedInputStream, BufferedOutputStream, IOException, PrintStream, PrintWriter, Closeable => JCloseable,
-  File => JFile
+  FileInputStream, FileOutputStream, BufferedWriter, OutputStreamWriter,
+  BufferedOutputStream, IOException, PrintWriter, File => JFile
 }
 
-import java.nio.channels.{ Channel, FileChannel }
 import scala.io.Codec
-import scala.language.{reflectiveCalls, implicitConversions}
 /**
  * ''Note:  This library is considered experimental and should not be used unless you know what you are doing.''
  */
diff --git a/src/reflect/scala/reflect/io/Path.scala b/src/reflect/scala/reflect/io/Path.scala
index 15fce953f2..5f93506015 100644
--- a/src/reflect/scala/reflect/io/Path.scala
+++ b/src/reflect/scala/reflect/io/Path.scala
@@ -7,12 +7,11 @@ package scala
 package reflect
 package io
 
-import java.io.{
-  FileInputStream, FileOutputStream, BufferedReader, BufferedWriter, InputStreamReader, OutputStreamWriter,
-  BufferedInputStream, BufferedOutputStream, RandomAccessFile, File => JFile }
+import scala.language.implicitConversions
+
+import java.io.{ RandomAccessFile, File => JFile }
 import java.net.{ URI, URL }
 import scala.util.Random.alphanumeric
-import scala.language.implicitConversions
 import scala.reflect.internal.util.Statistics
 
 /** An abstraction for filesystem paths.  The differences between
diff --git a/src/reflect/scala/reflect/io/PlainFile.scala b/src/reflect/scala/reflect/io/PlainFile.scala
index 8f24d84488..eb0940e703 100644
--- a/src/reflect/scala/reflect/io/PlainFile.scala
+++ b/src/reflect/scala/reflect/io/PlainFile.scala
@@ -7,8 +7,6 @@ package scala
 package reflect
 package io
 
-import java.io.{ FileInputStream, FileOutputStream, IOException }
-
 /** ''Note:  This library is considered experimental and should not be used unless you know what you are doing.'' */
 class PlainDirectory(givenPath: Directory) extends PlainFile(givenPath) {
   override def isDirectory = true
diff --git a/src/reflect/scala/reflect/io/Streamable.scala b/src/reflect/scala/reflect/io/Streamable.scala
index 99a14d1fb0..bc4031ca9b 100644
--- a/src/reflect/scala/reflect/io/Streamable.scala
+++ b/src/reflect/scala/reflect/io/Streamable.scala
@@ -7,8 +7,8 @@ package scala
 package reflect
 package io
 
-import java.net.{ URI, URL }
-import java.io.{ BufferedInputStream, InputStream, PrintStream }
+import java.net.URL
+import java.io.{ BufferedInputStream, InputStream }
 import java.io.{ BufferedReader, InputStreamReader, Closeable => JCloseable }
 import scala.io.{ Codec, BufferedSource, Source }
 import scala.collection.mutable.ArrayBuffer
diff --git a/src/reflect/scala/reflect/io/ZipArchive.scala b/src/reflect/scala/reflect/io/ZipArchive.scala
index 0c63acb86c..42e22fda6f 100644
--- a/src/reflect/scala/reflect/io/ZipArchive.scala
+++ b/src/reflect/scala/reflect/io/ZipArchive.scala
@@ -12,7 +12,7 @@ import java.io.{ IOException, InputStream, ByteArrayInputStream, FilterInputStre
 import java.io.{ File => JFile }
 import java.util.zip.{ ZipEntry, ZipFile, ZipInputStream }
 import java.util.jar.Manifest
-import scala.collection.{ immutable, mutable }
+import scala.collection.mutable
 import scala.collection.convert.WrapAsScala.asScalaIterator
 import scala.annotation.tailrec