Common/Model/Notify.php
public function removeAttachment(AttachmentInterface $attachment)
    {
        if ($this->attachments->contains($attachment)) {
            $this->attachments->removeElement($attachment);
        }

        return $this;
    }
public function removeAttachment(AttachmentInterface $attachment)
    {
        if ($this->attachments->contains($attachment)) {
            $this->attachments->removeElement($attachment);
        }

        return $this;
    }
Removes the attachment.

@param AttachmentInterface $attachment

@return Notify