feat: Fix names

Author: comphead

spark/src/main/scala/org/apache/comet/serde/QueryPlanSerde.scala

@@ -28,7 +28,7 @@ import org.apache.spark.sql.catalyst.expressions.objects.StaticInvoke
 import org.apache.spark.sql.catalyst.optimizer.NormalizeNaNAndZero
 import org.apache.spark.sql.catalyst.plans.physical.{HashPartitioning, Partitioning, SinglePartition}
 import org.apache.spark.sql.catalyst.util.CharVarcharCodegenUtils
-import org.apache.spark.sql.comet.{CometHashAggregateExec, CometPlan, CometSinkPlaceHolder, DecimalPrecision}
+import org.apache.spark.sql.comet.{CometSinkPlaceHolder, DecimalPrecision}
 import org.apache.spark.sql.execution
 import org.apache.spark.sql.execution._
 import org.apache.spark.sql.execution.aggregate.HashAggregateExec

spark/src/test/scala/org/apache/comet/CometExpressionSuite.scala

@@ -24,7 +24,7 @@ import java.util
 import org.apache.hadoop.fs.Path
 import org.apache.spark.sql.{CometTestBase, DataFrame, Row}
 import org.apache.spark.sql.execution.adaptive.AdaptiveSparkPlanHelper
-import org.apache.spark.sql.functions.{expr, lit}
+import org.apache.spark.sql.functions.expr
 import org.apache.spark.sql.internal.SQLConf
 import org.apache.spark.sql.internal.SQLConf.SESSION_LOCAL_TIMEZONE
 import org.apache.spark.sql.types.{Decimal, DecimalType, StructType}