Why can't I delete the coded marquee section in Dawn?

Hello everyone,

I’ve coded a marquee section for dawn, but don’t have the option to delete the section once it’s added (see attached png).

Below you can see the {% schema %} code…

{% schema %}

{

“name”: “Marquee”,

“max_blocks”: 5,

“settings”: [

{

“type”: “color”,

“id”: “bg_color”,

“default”: “#000”,

“label”: “Background color”

},

{

“type”: “select”,

“id”: “speed”,

“label”: “Speed”,

“default”: “20”,

“options”: [

{

“value”: “50”,

“label”: “50s”

},

{

“value”: “40”,

“label”: “40s”

},

{

“value”: “30”,

“label”: “30s”

},

{

“value”: “20”,

“label”: “20s”

},

{

“value”: “10”,

“label”: “10s”

}

]

}

],

“blocks”: [

{

“type”: “announcement”,

“name”: “Marquee”,

“settings”: [

{

“type”: “text”,

“id”: “text”,

“default”: “Welcome to our store”,

“label”: “t:sections.announcement-bar.blocks.announcement.settings.text.label”

},

{

“type”: “select”,

“id”: “text_alignment”,

“options”: [

{

“value”: “left”,

“label”: “t:sections.announcement-bar.blocks.announcement.settings.text_alignment.options__1.label”

},

{

“value”: “center”,

“label”: “t:sections.announcement-bar.blocks.announcement.settings.text_alignment.options__2.label”

},

{

“value”: “right”,

“label”: “t:sections.announcement-bar.blocks.announcement.settings.text_alignment.options__3.label”

}

],

“default”: “center”,

“label”: “t:sections.announcement-bar.blocks.announcement.settings.text_alignment.label”

},

{

“type”: “url”,

“id”: “link”,

“label”: “t:sections.announcement-bar.blocks.announcement.settings.link.label”

}

]

}

],

“default”: {

“blocks”: [

{

“type”: “announcement”

}

]

}

}

{% endschema %}

Can anyone help?

Cheers // Peter