.accordion-button.collapsed::after {
  background-image: none;
  display: none;
}

.accordion-button:not(.collapsed)::after {
  background: none!important;
  display: none;
}
.accordion-button {
  justify-content: space-between;
}

.accordion-button:not(.collapsed) i {
  transform: rotate(-180deg);
  transition: transform .2s ease-in-out;
}