To delete products from a collection, simply go ahead and follow the steps listed below:
Log into your SupaDupa admin
Click on the Collections tab
Go into the collection which you would like to organise and delete product(s) from. In this example, let's go into the home collection by clicking on the black text - 'Home' seen beside the purple tab.
Identify the product you want to delete and click on the cross icon seen on the right hand side of the product row.
Click Save changes.
That's it - your product has been deleted!