Query re annual savings letter

Hi, am on Cont Esa or Ns ESA as it's now called. As I previous qualified for a small amount of top up of IR Esa too ( long time ago)they still send me a letter annually asking about my savings. I haven't had any top up for a good while as savings went up, but still well under 16k. My question is, as they have now ended the IR ESA altogether will they still need to know my savings every year? I am Cont only and won't have any UC. Thank you.