Well, technically the condition was to expel the israeli and US ambassadors. This is the other way around, and AFAIK withdrawing your own ambassador is considered a less aggressive move than expelling the ambassador of the other country. And either way I strongly doubt they will do anything about their US relationship. So this seems to be just a based thing to do rather than trying to comply with iranian demands

edit: it seems israel already withdrawn their ambassador from Spain last May, so this move now feels completely unrelated to the demands.