No, and I agree, don't restrict her drinks unless you notice a very definite pattern (and even then, be very careful). It does make sense to keep to 'water only' after about 6pm.
There are lots of reasons that children don't wake to go to the toilet in the night.
I was taught in child development that this is normal up to age 6, and certainly found there was often a significant change at about age 5.
Some carers do 'lift' children to do a wee at about 10-11pm. I am wary of this, as disrupting sleep, and 'encouraging' passing urine in sleep is not always helpful. However, some find that it works so well that it is worth doing.
A small number of children do have specific issues about bladder control at night. You could check with the Health Visitor what the latest research shows.
I had one child who 'potty trained' himself, day and night at 20 months; and one who despite being very well trained by day at 3, did wet the bed until he was 9. I did seek some help at age 7, with varying results. The others were just in between.
