.select2-results__options,
.select2-results__option,
.chosen-results,
.chosen-results li {
  list-style: none !important;
}

.select2-results__option::marker,
.chosen-results li::marker {
  content: "";
}
.select2-results__option::before,
.chosen-results li::before {
  content: none !important;
  display: none !important;
}