Padding on a Bootstrap 3 col seems impossible to remove

I'm not sure what you want to achieve, but for me, if you make a very little change at page https://koed.dk/da-dk/page/stack like below, then effect is great:

.row.wrapping,
.row.wrapping .row {
    margin-left: -5px;
    margin-right: -5px;
}
.wrapping [class^=col-] {
    padding-left: 5px;
    padding-right: 5px;
}