Unable to compile because of unused parameter

There is a unused parameter at benchmark:866 Benchmark::MeasurePeakHeapMemory .
The function is marked as TODO and the code that uses the parameter is commented out.
I just removed the parameter so it can compile again without editing the CMake compile flags.
Compile warning removed, adding myself to contributors
Update AUTHORS
Merge pull request #15 from Nukesor/patch-1

Unable to compile because of unused parameter