Revert "add test"

This reverts commit 1eb985e.

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

@@ -735,18 +735,6 @@ class CometExpressionSuite extends CometTestBase with AdaptiveSparkPlanHelper {
     }
   }
 
-  test("add overflow ansi mode decimal") {
-    val value = BigDecimal("9" * 20 + "." + "9" * 18)
-    // TODO comet return null, control it and return the correct exception
-    val query = "select _1 + _2 from tbl"
-    withSQLConf(
-      SQLConf.ANSI_ENABLED.key -> "true",
-      CometConf.COMET_ANSI_MODE_ENABLED.key -> "true",
-      "spark.sql.decimalOperations.allowPrecisionLoss" -> "false") {
-      testAnsiOverflow(Seq((value, value)), query)
-    }
-  }
-
   test("divide by zero (ANSI disable)") {
     // Enabling ANSI will cause native engine failure, but as we cannot catch
     // native error now, we cannot test it here.