[KYUUBI #730] delete redundant empty line

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### _Why are the changes needed?_
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delete redundant empty line

### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

- [ ] Add screenshots for manual tests if appropriate

- [ ] [Run test](https://kyuubi.readthedocs.io/en/latest/tools/testing.html#running-tests) locally before make a pull request

Closes #730 from zhaomin1423/code_style.

Closes #730

33ec472b [Min Zhao] delete redundant empty line

Authored-by: Min Zhao <zhaomin1423@163.com>
Signed-off-by: ulysses-you <ulyssesyou18@gmail.com>

kyuubi-common/src/test/scala/org/apache/kyuubi/operation/JDBCTests.scala

@@ -357,8 +357,6 @@ trait JDBCTests extends BasicJDBCTests {
       val rs = statement.executeQuery("SELECT kyuubi_version()")
       assert(rs.next())
       assert(rs.getString(1) == KYUUBI_VERSION)
-
     }
-
   }
 }