No. That part of code was allready in your L2PcInstance.java. It may have been allitle different due to different packs/revs. Just look at the code, first part of code is about kill sprees, later its just regular checks after pvp kill. Dont just copy code blindly, try to understand wich line does what and you will know what you need and what is unesscesary.
When someone posts part of code for something (in this case kill spree), they usualy post it this way:
some original code (not modyfied)
modyfied part (in this case kill spree)
some original code again.
This is being done so that you would know where to add/replace the modyfied code. Do not copy part with original code, just find that oroginal code in your files and compare whats the difference. And apply only the difference :)
I hope you'll get what I mean.