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".

7 files changed, 9 insertions, 13 deletions

diff --git a/src/reflect/scala/reflect/internal/util/AbstractFileClassLoader.scala b/src/reflect/scala/reflect/internal/util/AbstractFileClassLoader.scala
index 5cbdb92664..b5030460b8 100644
--- a/src/reflect/scala/reflect/internal/util/AbstractFileClassLoader.scala
+++ b/src/reflect/scala/reflect/internal/util/AbstractFileClassLoader.scala
@@ -5,8 +5,8 @@
 package scala
 package reflect.internal.util
 
-import scala.collection.{ mutable, immutable }
-import scala.reflect.io.{ AbstractFile, Streamable }
+import scala.collection.mutable
+import scala.reflect.io.AbstractFile
 import java.net.{ URL, URLConnection, URLStreamHandler }
 import java.security.cert.Certificate
 import java.security.{ ProtectionDomain, CodeSource }
diff --git a/src/reflect/scala/reflect/internal/util/FreshNameCreator.scala b/src/reflect/scala/reflect/internal/util/FreshNameCreator.scala
index 8442c1015f..c69dd23c40 100644
--- a/src/reflect/scala/reflect/internal/util/FreshNameCreator.scala
+++ b/src/reflect/scala/reflect/internal/util/FreshNameCreator.scala
@@ -8,7 +8,6 @@ package util
 
 import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.atomic.AtomicLong
-import scala.collection.mutable
 import scala.reflect.NameTransformer
 
 class FreshNameCreator(creatorPrefix: String = "") {
diff --git a/src/reflect/scala/reflect/internal/util/Origins.scala b/src/reflect/scala/reflect/internal/util/Origins.scala
index 2eb4fa29d5..4c425457a7 100644
--- a/src/reflect/scala/reflect/internal/util/Origins.scala
+++ b/src/reflect/scala/reflect/internal/util/Origins.scala
@@ -7,7 +7,7 @@ package scala
 package reflect
 package internal.util
 
-import scala.collection.{ mutable, immutable }
+import scala.collection.mutable
 
 /** A debugging class for logging from whence a method is being called.
  *  Say you wanted to discover who was calling phase_= in SymbolTable.
diff --git a/src/reflect/scala/reflect/internal/util/ScalaClassLoader.scala b/src/reflect/scala/reflect/internal/util/ScalaClassLoader.scala
index 296934e253..cc5be92489 100644
--- a/src/reflect/scala/reflect/internal/util/ScalaClassLoader.scala
+++ b/src/reflect/scala/reflect/internal/util/ScalaClassLoader.scala
@@ -6,16 +6,16 @@
 package scala
 package reflect.internal.util
 
+import scala.language.implicitConversions
+
 import java.lang.{ ClassLoader => JClassLoader }
-import java.lang.reflect.{ Constructor, Modifier, Method }
-import java.io.{ File => JFile }
+import java.lang.reflect.Modifier
 import java.net.{ URLClassLoader => JURLClassLoader }
 import java.net.URL
-import scala.reflect.internal.FatalError
+
 import scala.reflect.runtime.ReflectionUtils.{ show, unwrapHandler }
 import ScalaClassLoader._
 import scala.util.control.Exception.{ catching }
-import scala.language.implicitConversions
 import scala.reflect.{ ClassTag, classTag }
 
 trait HasClassPath {
diff --git a/src/reflect/scala/reflect/internal/util/TraceSymbolActivity.scala b/src/reflect/scala/reflect/internal/util/TraceSymbolActivity.scala
index e4a6503184..e48c35908f 100644
--- a/src/reflect/scala/reflect/internal/util/TraceSymbolActivity.scala
+++ b/src/reflect/scala/reflect/internal/util/TraceSymbolActivity.scala
@@ -2,8 +2,7 @@ package scala
 package reflect.internal
 package util
 
-import scala.collection.{ mutable, immutable }
-import scala.language.postfixOps
+import scala.collection.mutable
 
 trait TraceSymbolActivity {
   val global: SymbolTable
diff --git a/src/reflect/scala/reflect/internal/util/WeakHashSet.scala b/src/reflect/scala/reflect/internal/util/WeakHashSet.scala
index 83d2a3453b..f8dfa720d5 100644
--- a/src/reflect/scala/reflect/internal/util/WeakHashSet.scala
+++ b/src/reflect/scala/reflect/internal/util/WeakHashSet.scala
@@ -3,7 +3,6 @@ package reflect.internal.util
 
 import java.lang.ref.{WeakReference, ReferenceQueue}
 import scala.annotation.tailrec
-import scala.collection.generic.Clearable
 import scala.collection.mutable.{Set => MSet}
 
 /**
@@ -403,4 +402,4 @@ object WeakHashSet {
   val defaultLoadFactor = .75
 
   def apply[A <: AnyRef](initialCapacity: Int = WeakHashSet.defaultInitialCapacity, loadFactor: Double = WeakHashSet.defaultLoadFactor) = new WeakHashSet[A](initialCapacity, defaultLoadFactor)
-}
\ No newline at end of file
+}
diff --git a/src/reflect/scala/reflect/internal/util/package.scala b/src/reflect/scala/reflect/internal/util/package.scala
index 3618c150ca..ec5938b902 100644
--- a/src/reflect/scala/reflect/internal/util/package.scala
+++ b/src/reflect/scala/reflect/internal/util/package.scala
@@ -5,7 +5,6 @@ package internal
 import scala.language.existentials // SI-6541
 
 package object util {
-  import StringOps.longestCommonPrefix
 
   // An allocation-avoiding reusable instance of the so-common List(Nil).
   val ListOfNil: List[List[Nothing]] = Nil :: Nil