Common/Model/Notify.php
public function removeLabel(ShipmentLabelInterface $label)
    {
        if ($this->labels->contains($label)) {
            $this->labels->removeElement($label);
        }

        return $this;
    }
public function removeLabel(ShipmentLabelInterface $label)
    {
        if ($this->labels->contains($label)) {
            $this->labels->removeElement($label);
        }

        return $this;
    }
Removes the label.

@param ShipmentLabelInterface $label

@return Notify