You can do a workaround

.docblock-argstable .docblock-argstable-head th:nth-child(3) {
  display: none !important;
}


.docblock-argstable .docblock-argstable-body td:nth-child(3) {
  display: none !important;
}

But you need to link the stylesheet to manager-head.html inside .storybook dir