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

[Daohan Qu]

On Thu, 6 Jul 2023 13:01:18 GMT, Daohan Qu <dqu 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.

You might find the patch that removes the usage of the jar file here.

https://hg.openjdk.org/jdk/jdk/rev/461e0b7e6dfe#l11.1

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PR Comment: https://git.openjdk.org/jdk/pull/14784#issuecomment-1623670016