RFR: 8311581: Remove obsolete code and comments in TestLVT.java

[Daohan Qu]

On Thu, 6 Jul 2023 13:18:37 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> This is a trivial cleanup patch.
>> 
>> The usage of `testcase.jar` in `LocalVariableTable/TestLVT.java` has been removed in [JDK-8239461](https://bugs.openjdk.org/browse/JDK-8239461). So related code and comments should be removed as well.
>
> Looks good and trivial.

Thanks for your review @coleenp !

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PR Comment: https://git.openjdk.org/jdk/pull/14784#issuecomment-1623670993