Removes a previously added custom tile.
sambaFrame.on('userJoined', (event) => {
const data = event.data;
if (data.type === 'local') {
sambaFrame.addCustomTile({
"name": "AI",
"html": '<img src="https://media0.giphy.com/media/v1.Y2lkPTc5MGI3NjExdjR5YjF5dWQ4d2d2NzI5eHFyYmxyczgydzRuZ2JwZ2F4MTliaGo2bCZlcD12MV9pbnRlcm5hbF9naWZfYnlfaWQmY3Q9Zw/MHMO7iYMt6pJrEpKNB/giphy.gif"/>',
"position": "last"
});
}
});
//Later at some point
sambaFrame.removeCustomTile("AI");