[streaming] Serializable no longer needed for examples

Due to the recent serialization changes.

flink-staging/flink-streaming/flink-streaming-examples/src/main/java/org/apache/flink/streaming/examples/windowing/StockPrices.java

@@ -17,7 +17,6 @@
 
 package org.apache.flink.streaming.examples.windowing;
 
-import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Random;
@@ -204,7 +203,7 @@ public class StockPrices {
 	// DATA TYPES
 	// *************************************************************************
 
-	public static class StockPrice implements Serializable {
+	public static class StockPrice {
 
 		private static final long serialVersionUID = 1L;
 		public String symbol;
@@ -227,7 +226,7 @@ public class StockPrices {
 		}
 	}
 
-	public static class Count implements Serializable {
+	public static class Count {
 		
 		private static final long serialVersionUID = 1L;
 		public String symbol;

flink-staging/flink-streaming/flink-streaming-examples/src/main/scala/org/apache/flink/streaming/scala/examples/windowing/TopSpeedWindowing.scala

@@ -38,7 +38,7 @@ import scala.util.Random
  */
 object TopSpeedWindowing {
 
-  case class CarEvent(carId: Int, speed: Int, distance: Double, time: Long) extends Serializable
+  case class CarEvent(carId: Int, speed: Int, distance: Double, time: Long)
 
   def main(args: Array[String]) {
     if (!parseParameters(args)) {