Remove custom domain from Cognito User Pool

code/auth/certificates.tf

-################
-# CERTIFICATES #
-################
-
-####
-# CREATE AND VALIDATE COGNITO PUBLIC CERTIFICATE
-####
-
-resource "aws_acm_certificate" "cognito_cert" {
-  provider                  = aws.global
-  domain_name               = "auth.${var.DNS_NAME}"
-  validation_method         = "DNS"
-  subject_alternative_names = []
-  lifecycle {
-    create_before_destroy = true
-  }
-  tags = merge(var.TAGS, { Name = "${var.APP_NAME}-${var.STAGE}" })
-}
-resource "aws_route53_record" "cognito_cert_validation" {
-  depends_on      = [ aws_acm_certificate.cognito_cert ]
-  name            = aws_acm_certificate.cognito_cert.domain_validation_options.0.resource_record_name
-  type            = aws_acm_certificate.cognito_cert.domain_validation_options.0.resource_record_type
-  zone_id         = data.aws_route53_zone.main.zone_id
-  records         = [ aws_acm_certificate.cognito_cert.domain_validation_options.0.resource_record_value ]
-  ttl             = 60
-  allow_overwrite = true
-}
-resource "aws_acm_certificate_validation" "cognito_cert" {
-  depends_on              = [ aws_route53_record.cognito_cert_validation ]
-  provider                = aws.global
-  certificate_arn         = aws_acm_certificate.cognito_cert.arn
-  validation_record_fqdns = [ aws_route53_record.cognito_cert_validation.fqdn ]
-}