Update SQLQuerySuite.scala

Author: AngersZhuuuu

sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala

@@ -22,11 +22,9 @@ import java.net.{MalformedURLException, URL}
 import java.sql.{Date, Timestamp}
 import java.util.concurrent.atomic.AtomicBoolean
 
-import scala.collection.mutable
 import scala.collection.mutable.ArrayBuffer
 
 import org.apache.spark.{AccumulatorSuite, SparkException}
-
 import org.apache.spark.scheduler.{SparkListener, SparkListenerJobStart}
 import org.apache.spark.sql.catalyst.expressions.GenericRow
 import org.apache.spark.sql.catalyst.expressions.aggregate.{Complete, Partial}