SI-7624 Fix a few remaining -Xlint warnings ...

in various places. This includes actors, compiler (mostly some new
macro parts) continuations, partest, scaladoc, scalap.

Author: soc

src/continuations/plugin/scala/tools/selectivecps/CPSAnnotationChecker.scala

@@ -395,8 +395,7 @@ abstract class CPSAnnotationChecker extends CPSUtils {
     /** Modify the type that has thus far been inferred
      *  for a tree.  All this should do is add annotations. */
 
-    override def pluginsTyped(tpe: Type, typer: Typer, tree: Tree, mode: Int, pt: Type): Type = {
-      import scala.util.control._
+    override def pluginsTyped(tpe: Type, typer: Typer, tree: Tree, mode: Mode, pt: Type): Type = {
       if (!cpsEnabled) {
         val report = try hasCpsParamTypes(tpe) catch { case _: MissingRequirementError => false }
         if (report)