Switch to regular comment instead of scaladoc

Having this as scaladoc adds an unmoored doc comment compiler warning
because no documentation is generated for the class that is being
documented.

main-settings/src/main/scala/sbt/std/TaskLinterDSL.scala

@@ -28,7 +28,7 @@ abstract class BaseTaskLinterDSL extends LinterDSL {
     val unchecked = symbolOf[sbt.sbtUnchecked].asClass
     val initializeType = typeOf[sbt.Def.Initialize[_]]
 
-    /**
+    /*
      * Lints a task tree.
      *
      * @param insideIf indicates whether or not the current tree is enclosed in an if statement.