RFR(xs): 8148053: Remove unused log tags

[Robbin Ehn]

Hi,

Please review, this removes unused tags in UL.

Testing:
Passed RBT build

Bug: https://bugs.openjdk.java.net/browse/JDK-8148053
Webrev: http://cr.openjdk.java.net/~mlarsson/rehn/8148053/

Thanks and thanks Marcus for hosting!

/Robbin