Update code

Author: beliefer

sql/core/src/main/scala/org/apache/spark/sql/execution/command/commands.scala

@@ -21,7 +21,7 @@ import scala.collection.JavaConverters._
 import scala.util.control.NonFatal
 
 import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.{AnalysisException, Row, SparkSession}
+import org.apache.spark.sql.{Row, SparkSession}
 import org.apache.spark.sql.catalyst.{CatalystTypeConverters, InternalRow}
 import org.apache.spark.sql.catalyst.expressions.{Attribute, AttributeReference}
 import org.apache.spark.sql.catalyst.plans.QueryPlan