8217329: JTREG: Clean up, remove unused imports in gc folder

[Thomas Schatzl]

Hi,

On Thu, 2019-01-17 at 17:58 +0100, Leo Korinth wrote:
> Hi,
> 
> This fix removes unused imports and newlines in the jtreg/gc folder.
> 
> This fix is somewhat based/dependent on "8214799: Add package 
> declaration to each JTREG test case in the gc folder". That fix is
> out for review.

I assume the work has been performed mostly mechanically with an IDE
(Eclipse?) to make sure they are good :)

Looks good.

Thomas