Extraneous tags for JDK-8222137 backports

[Aleksey Shipilev]

On 5/3/19 12:26 PM, Seán Coffey wrote:
> Christoph added the jdk11u-fix-request label to the master bug report. That gets copied to the
> sibling records when backports are created. (side effect of JBS which I'd like to see changed)
> 
> I only added the jdk12u-fix-request label and that's only on the master bug report. I'll fix up the
> backport records now.

Ah, that explains it. Yes, please remove the extra tags from backports issues.

Cheers,
-Aleksey