RFR: 8261444: Remove unused fields in Lower

[Claes Redestad]

On Tue, 9 Feb 2021 14:19:56 GMT, Vicente Romero <vromero at openjdk.org> wrote:

>> A small code cleanup in Lower, removing a few unused fields.
>> 
>> Last usage of classDollar was removed by JDK-8175191, and dollarCloseResource was removed by JDK-8194978
>> 
>> Testing: tier1-2
>
> looks good

Thanks Vicente!

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PR: https://git.openjdk.java.net/jdk/pull/2482