Coff, as far as I know, the cockpit warning on the teleight panel was removed because the wing lock was no longer an aircrew action. A bit like having a caption for an undercarriage lock in place. The telelight remained in the F4K (FG1) because it was something you could, and often did, do from the cockpit. In the FGR2, checking that the wings were locked was a part of the walk round. Not saying that's a good reason, it's just my understanding of the situation.