all the tools i can see out there are very language specific, might as well write one from scratch.
refactoring requires a parser. the best parser for pike is pike itself, hence, in order to write a refactoring tool for pike, pike would need this functionality (then the tool could run the code through pike, get a list and report that list to the user or do something more useful (like automaticly remove the items in question)
greetings, martin.