[MINOR][SQL] Remove extra anonymous closure within functional transformations

## What changes were proposed in this pull request?

This PR removes extra anonymous closure within functional transformations.

For example,

```scala
.map(item => {
  ...
})
```

which can be just simply as below:

```scala
.map { item =>
  ...
}
```

## How was this patch tested?

Related unit tests and `sbt scalastyle`.

Author: hyukjinkwon <gurwls223@gmail.com>

Closes #12382 from HyukjinKwon/minor-extra-closers.

2 files changed, 4 insertions, 4 deletions

diff --git a/examples/src/main/scala/org/apache/spark/examples/streaming/RecoverableNetworkWordCount.scala b/examples/src/main/scala/org/apache/spark/examples/streaming/RecoverableNetworkWordCount.scala
index b6b8bc33f7..bb2af9cd72 100644
--- a/examples/src/main/scala/org/apache/spark/examples/streaming/RecoverableNetworkWordCount.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/streaming/RecoverableNetworkWordCount.scala
@@ -116,7 +116,7 @@ object RecoverableNetworkWordCount {
     val lines = ssc.socketTextStream(ip, port)
     val words = lines.flatMap(_.split(" "))
     val wordCounts = words.map(x => (x, 1)).reduceByKey(_ + _)
-    wordCounts.foreachRDD((rdd: RDD[(String, Int)], time: Time) => {
+    wordCounts.foreachRDD { (rdd: RDD[(String, Int)], time: Time) =>
       // Get or register the blacklist Broadcast
       val blacklist = WordBlacklist.getInstance(rdd.sparkContext)
       // Get or register the droppedWordsCounter Accumulator
@@ -135,7 +135,7 @@ object RecoverableNetworkWordCount {
       println("Dropped " + droppedWordsCounter.value + " word(s) totally")
       println("Appending to " + outputFile.getAbsolutePath)
       Files.append(output + "\n", outputFile, Charset.defaultCharset())
-    })
+    }
     ssc
   }
 
diff --git a/examples/src/main/scala/org/apache/spark/examples/streaming/SqlNetworkWordCount.scala b/examples/src/main/scala/org/apache/spark/examples/streaming/SqlNetworkWordCount.scala
index 3727f8fe6a..918e124065 100644
--- a/examples/src/main/scala/org/apache/spark/examples/streaming/SqlNetworkWordCount.scala
+++ b/examples/src/main/scala/org/apache/spark/examples/streaming/SqlNetworkWordCount.scala
@@ -59,7 +59,7 @@ object SqlNetworkWordCount {
     val words = lines.flatMap(_.split(" "))
 
     // Convert RDDs of the words DStream to DataFrame and run SQL query
-    words.foreachRDD((rdd: RDD[String], time: Time) => {
+    words.foreachRDD { (rdd: RDD[String], time: Time) =>
       // Get the singleton instance of SQLContext
       val sqlContext = SQLContextSingleton.getInstance(rdd.sparkContext)
       import sqlContext.implicits._
@@ -75,7 +75,7 @@ object SqlNetworkWordCount {
         sqlContext.sql("select word, count(*) as total from words group by word")
       println(s"========= $time =========")
       wordCountsDataFrame.show()
-    })
+    }
 
     ssc.start()
     ssc.awaitTermination()