[SPARK-5951][YARN] Remove unreachable driver memory properties in yarn client mode

Remove unreachable driver memory properties in yarn client mode

Author: mohit.goyal <mohit.goyal@guavus.com>

Closes #4730 from zuxqoj/master and squashes the following commits:

977dc96 [mohit.goyal] remove not rechable deprecated variables in yarn client mode

yarn/src/main/scala/org/apache/spark/scheduler/cluster/YarnClientSchedulerBackend.scala

@@ -79,18 +79,12 @@ private[spark] class YarnClientSchedulerBackend(
       )
     // Warn against the following deprecated environment variables: env var -> suggestion
     val deprecatedEnvVars = Map(
-      "SPARK_MASTER_MEMORY" -> "SPARK_DRIVER_MEMORY or --driver-memory through spark-submit",
       "SPARK_WORKER_INSTANCES" -> "SPARK_WORKER_INSTANCES or --num-executors through spark-submit",
       "SPARK_WORKER_MEMORY" -> "SPARK_EXECUTOR_MEMORY or --executor-memory through spark-submit",
       "SPARK_WORKER_CORES" -> "SPARK_EXECUTOR_CORES or --executor-cores through spark-submit")
-    // Do the same for deprecated properties: property -> suggestion
-    val deprecatedProps = Map("spark.master.memory" -> "--driver-memory through spark-submit")
     optionTuples.foreach { case (optionName, envVar, sparkProp) =>
       if (sc.getConf.contains(sparkProp)) {
         extraArgs += (optionName, sc.getConf.get(sparkProp))
-        if (deprecatedProps.contains(sparkProp)) {
-          logWarning(s"NOTE: $sparkProp is deprecated. Use ${deprecatedProps(sparkProp)} instead.")
-        }
       } else if (System.getenv(envVar) != null) {
         extraArgs += (optionName, System.getenv(envVar))
         if (deprecatedEnvVars.contains(envVar)) {