Why do you want to remove unneeded code? what harm is it doing you?
A wise programer might answer that it hurts performance or my contain bugs that harm overall stability, but seeing as you have no desire to learn perl, you are not in a positon to fix bugs or performance issues, and removing code you don't understand more likey to break the program than help it, so my advice is not to edit the code any more than you have to.
Having said that, if you realy want to know what parts of the code are not used, My advice would be to use a coverage or profing tool such as Devel::Cover or Devel::NYTProf to tell you which parts of the code are not touched during a typical run of the program.
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