Here AllBirthCertificateNumbers is an array and remove that element that has a similar BabyBirthId
let value = this.AllBirthCertificateNumbers.find(a => a.BabyBirthDetailsId == this.BirthDetail.BabyBirthDetailsId);
if (value) {
let valueIndex = this.AllBirthCertificateNumbers.indexOf(value);
this.AllBirthCertificateNumbers.splice(valueIndex, 1);