JLI is canon again, just like everything else. The point of IF is going back to the canon most people love. This is just a strange oopsie by Jurgens. It happens a lot with DC nowadays, and writers are still polishing the rough edges. We're just coming out from DiDio's mess and going back to something resembling the old DCU, this is fresh so it's to be expected. You can be absolutely sure the JLI will probably be mentioned down the line by other writers.