Revert "Merge pull request #423 from marco-c/jitjit"

@marco-c: This reverts the JIT branch (3fb9725709c210ed54a8026b3755c2ae04d3bcbd) in order to fix an issue I noticed while testing a midlet. Another option would be to figure out why that midlet is failing on the JIT branch. I'm not quite sure how to tackle that, though, as there aren't obvious errors in the log.