Remove unused line

Author: zsxwing

core/src/test/scala/org/apache/spark/deploy/StandaloneDynamicAllocationSuite.scala

@@ -428,7 +428,6 @@ class StandaloneDynamicAllocationSuite
    * don't wait for executors to register. Otherwise the tests will take much longer to run.
    */
   private def getExecutorIds(sc: SparkContext): Seq[String] = {
-    val apps = getApplications()
     val app = getApplications().find(_.id == sc.applicationId)
     assert(app.isDefined)
     // Although executors is transient, master is in the same process so the message won't be