Update SQLMetricsSuite.scala

Author: AngersZhuuuu

sql/core/src/test/scala/org/apache/spark/sql/execution/metric/SQLMetricsSuite.scala

@@ -797,9 +797,7 @@ class SQLMetricsSuite extends SharedSparkSession with SQLMetricsTestUtils
       "org.apache.spark.sql.execution.metric.CustomFileCommitProtocol") {
       withTable("t", "t2") {
         sql("CREATE TABLE t(id STRING) USING PARQUET")
-        sql("INSERT INTO TABLE t SELECT 'abc'")
-        sql("CREATE TABLE t2(id STRING) USING PARQUET")
-        val df = sql("INSERT INTO TABLE t2 SELECT * FROM  t")
+        val df = sql("INSERT INTO TABLE t SELECT 'abc'")
         val insert = df.queryExecution.executedPlan.collect {
           case CommandResultExec(_, dataWriting: DataWritingCommandExec, _) => dataWriting.cmd
         }