title: package statement marked as "unused import"
body: <p>I have a scala class which defines his package like this</p>
  
  <p><code>package exporters</code></p>
  
  <p>The class is under the following directory structure:</p>
  
  <p><code>src/main/scala/exporters/ExporterManager.scala</code></p>
  
  <p>When compiling the project with <code>sbt</code>, I get the following warning:</p>
  
  <pre><code>[warn] /scala/export/src/main/scala/exporters/ExporterManager.scala:1:Unused import
  [warn] package exporters
  [warn] ^
  [warn] one warning found
  </code></pre>
  
  <p>How can I fix this warning?</p>
  
  <p>EDIT:</p>
  
  <p>Here is an extract of the class code:</p>
  
  <pre><code>package exporters
  
  import java.util.Date
  import java.util.concurrent.atomic.AtomicInteger
  
  import akka.actor.SupervisorStrategy.Stop
  import akka.actor._
  import com.amazonaws.services.cloudwatch.model.{StandardUnit, MetricDatum, PutMetricDataRequest}
  ...
  
  import scala.collection.JavaConversions._
  import scala.collection.mutable.ArrayBuffer
  import scala.concurrent.duration._
  import scala.pickling.Defaults._
  import scala.pickling.json._
  import scala.util.Try
  
  class ExporterManager extends Actor with ActorJsonLogging {
      def receive = {
          ....
      }
  
      ...
  }
  </code></pre>
  
  <p>The missing imports are for our classes but nothing special. It is a basic Akka actor.</p>