[HUDI-3653] Cleaning up bespoke Column Stats Index implementation (#5062)

hudi-client/hudi-spark-client/src/test/java/org/apache/hudi/index/columnstats/TestColumnStatsIndexHelper.java

@@ -1,41 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-package org.apache.hudi.index.columnstats;
-
-import org.junit.jupiter.api.Test;
-
-import java.util.Arrays;
-
-import static org.junit.jupiter.api.Assertions.assertEquals;
-
-public class TestColumnStatsIndexHelper {
-
-  @Test
-  public void testMergeSql() {
-    String q = ColumnStatsIndexHelper.createIndexMergeSql("old", "new", Arrays.asList("file", "a", "b"));
-    assertEquals(
-        "SELECT "
-            + "if (new.file is null, old.file, new.file) AS file, "
-            + "if (new.a is null, old.a, new.a) AS a, "
-            + "if (new.b is null, old.b, new.b) AS b "
-            + "FROM old FULL JOIN new ON old.file = new.file", q);
-  }
-
-}