RFR: 8198948: Remove unused parameter evacuation_info from G1CollectedHeap::evacuate_collection_set

[Erik Helin]

Hi all,

while cruising through the code on this fine Friday morning I noticed 
that the parameter evacuation_info for 
G1CollectedHeap::evacuate_collection_set is not used, so I simply 
removed it :)

Issue:
https://bugs.openjdk.java.net/browse/JDK-8198948

Webrev:
http://cr.openjdk.java.net/~ehelin/8198948/00/

Testing:
- make run-test-tier1 on Linux x86-64

Thanks,
Erik