unused changes

Author: scwf

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala

@@ -21,8 +21,8 @@ import java.sql.{Date, Timestamp}
 import java.text.{DateFormat, SimpleDateFormat}
 
 import org.apache.spark.Logging
-import org.apache.spark.sql.types._
 import org.apache.spark.sql.catalyst.errors.TreeNodeException
+import org.apache.spark.sql.types._
 
 /** Cast the child expression to the target data type. */
 case class Cast(child: Expression, dataType: DataType) extends UnaryExpression with Logging {