Remove never used vals

Author: Philippus

src/main/scala/scala/async/internal/AnfTransform.scala

@@ -329,7 +329,6 @@ private[async] trait AnfTransform {
 
         val matchResults = collection.mutable.Buffer[Tree]()
         def modifyLabelDef(ld: LabelDef): (Tree, Tree) = {
-          val symTab = c.universe.asInstanceOf[reflect.internal.SymbolTable]
           val param = ld.params.head
           val ld2 = if (ld.params.head.tpe.typeSymbol == definitions.UnitClass) {
             // Unit typed match: eliminate the label def parameter, but don't create a matchres temp variable to

src/main/scala/scala/async/internal/ExprBuilder.scala

@@ -519,7 +519,6 @@ trait ExprBuilder {
        *     }
        */
       private def resumeFunTree[T: WeakTypeTag]: Tree = {
-        val stateMemberSymbol = symLookup.stateMachineMember(name.state)
         val stateMemberRef = symLookup.memberRef(name.state)
         val body = Match(stateMemberRef, mkCombinedHandlerCases[T] ++ initStates.flatMap(_.mkOnCompleteHandler[T]) ++ List(CaseDef(Ident(termNames.WILDCARD), EmptyTree, Throw(Apply(Select(New(Ident(defn.IllegalStateExceptionClass)), termNames.CONSTRUCTOR), List())))))
         val body1 = compactStates(body)
@@ -582,7 +581,7 @@ trait ExprBuilder {
        *     }
        */
       def onCompleteHandler[T: WeakTypeTag]: Tree = {
-        val onCompletes = initStates.flatMap(_.mkOnCompleteHandler[T])
+        initStates.flatMap(_.mkOnCompleteHandler[T])
         forever {
           adaptToUnit(toList(resumeFunTree))
         }

src/main/scala/scala/async/internal/Lifter.scala

@@ -40,7 +40,7 @@ trait Lifter {
       def record(defs: List[Tree]): Unit = {
         // Keep note of local companions so we rename them consistently
         // when lifting.
-        val comps = for {
+        for {
           cd@ClassDef(_, _, _, _) <- defs
           md@ModuleDef(_, _, _) <- defs
           if (cd.name.toTermName == md.name)