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".

3 files changed, 4 insertions, 6 deletions

diff --git a/src/compiler/scala/tools/reflect/FastTrack.scala b/src/compiler/scala/tools/reflect/FastTrack.scala
index 8fed53c89f..dc26c93066 100644
--- a/src/compiler/scala/tools/reflect/FastTrack.scala
+++ b/src/compiler/scala/tools/reflect/FastTrack.scala
@@ -4,7 +4,6 @@ package reflect
 import scala.reflect.reify.Taggers
 import scala.tools.nsc.typechecker.{ Analyzer, Macros }
 import scala.reflect.runtime.Macros.currentMirror
-import scala.reflect.api.Universe
 import scala.reflect.quasiquotes.{ Quasiquotes => QuasiquoteImpls }
 
 /** Optimizes system macro expansions by hardwiring them directly to their implementations
diff --git a/src/compiler/scala/tools/reflect/FormatInterpolator.scala b/src/compiler/scala/tools/reflect/FormatInterpolator.scala
index b445f1e2bb..cbdb01a10a 100644
--- a/src/compiler/scala/tools/reflect/FormatInterpolator.scala
+++ b/src/compiler/scala/tools/reflect/FormatInterpolator.scala
@@ -6,7 +6,7 @@ import scala.reflect.internal.util.Position
 import scala.PartialFunction.cond
 import scala.util.matching.Regex.Match
 
-import java.util.{ Formatter, Formattable, IllegalFormatException }
+import java.util.Formattable
 
 abstract class FormatInterpolator {
   val c: Context
@@ -262,7 +262,7 @@ abstract class FormatInterpolator {
     def goodFlags = {
       val badFlags = flags map (_ filterNot (okFlags contains _))
       for (bf <- badFlags; f <- bf) badFlag(f, s"Illegal flag '$f'")
-      badFlags.getOrElse("").isEmpty 
+      badFlags.getOrElse("").isEmpty
     }
     def goodIndex = {
       if (index.nonEmpty && hasFlag('<'))
@@ -281,7 +281,7 @@ abstract class FormatInterpolator {
       ) orElse Some(variants(0))
   }
   object Conversion {
-    import SpecifierGroups.{ Spec, CC, Width }
+    import SpecifierGroups.{ Spec, CC }
     def apply(m: Match, p: Position, n: Int): Option[Conversion] = {
       def badCC(msg: String) = {
         val dk = new ErrorXn(m, p)
diff --git a/src/compiler/scala/tools/reflect/ToolBoxFactory.scala b/src/compiler/scala/tools/reflect/ToolBoxFactory.scala
index 47c88f2c00..ae6a9e22b6 100644
--- a/src/compiler/scala/tools/reflect/ToolBoxFactory.scala
+++ b/src/compiler/scala/tools/reflect/ToolBoxFactory.scala
@@ -3,13 +3,12 @@ package tools
 package reflect
 
 import scala.tools.cmd.CommandLineParser
-import scala.tools.nsc.Global
 import scala.tools.nsc.reporters._
 import scala.tools.nsc.CompilerCommand
 import scala.tools.nsc.io.{AbstractFile, VirtualDirectory}
 import scala.reflect.internal.util.AbstractFileClassLoader
 import scala.reflect.internal.Flags._
-import scala.reflect.internal.util.{BatchSourceFile, NoSourceFile, NoFile}
+import scala.reflect.internal.util.NoSourceFile
 import java.lang.{Class => jClass}
 import scala.compat.Platform.EOL
 import scala.reflect.NameTransformer