Addressing review comments. simplified isin test case

Author: sureshthalamati

sql/core/src/test/scala/org/apache/spark/sql/jdbc/JDBCSuite.scala

@@ -855,8 +855,7 @@ class JDBCSuite extends SparkFunSuite
     assert(sql("SELECT * FROM mixedCaseCols WHERE Name LIKE '%re%'").collect().size == 1)
     assert(sql("SELECT * FROM mixedCaseCols WHERE Name IS NULL").collect().size == 1)
     assert(sql("SELECT * FROM mixedCaseCols WHERE Name IS NOT NULL").collect().size == 2)
-    assert(sql("SELECT * FROM mixedCaseCols")
-      .filter($"Name".isin(Array[String]() : _*)).collect().size == 0)
+    assert(sql("SELECT * FROM mixedCaseCols").filter($"Name".isin()).collect().size == 0)
     assert(sql("SELECT * FROM mixedCaseCols WHERE Name IN ('mary', 'fred')").collect().size == 2)
     assert(sql("SELECT * FROM mixedCaseCols WHERE Name NOT IN ('fred')").collect().size == 1)
     assert(sql("SELECT * FROM mixedCaseCols WHERE Id = 1 OR Name = 'mary'").collect().size == 2)