fix_incorrect_compatiblity_msg_comet_sum

Author: coderfender

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

@@ -204,9 +204,7 @@ object CometAverage extends CometAggregateExpressionSerde[Average] {
 }
 
 object CometSum extends CometAggregateExpressionSerde[Sum] {
-
-  override def getIncompatibleReasons(): Seq[String] = Seq("Falls back to Spark in ANSI mode.")
-
+  
   override def convert(
       aggExpr: AggregateExpression,
       sum: Sum,