v1/web/modules/contrib/bootstrap_styles/css/themes-overrides.css

#bs_ui .custom-control-label::before, #bs_ui .custom-control-label::after {
  display: none;
}

#bs_ui .custom-control {
  padding-left: 0;
  margin-top: 10px;
  margin-bottom: 10px;
}

#bs_ui .custom-switch {
  padding-left: 0;
}