import { createAdminClient } from '@spree/admin-sdk'

const client = createAdminClient({
  baseUrl: 'https://your-store.com',
  secretKey: 'sk_xxx',
})

const { removed_count } = await client.collections.products.delete('coll_UkLWZg9DAJ', [
  'prod_UkLWZg9DAJ',
])

spree api delete /collections/{collection_id}/products

{
  "removed_count": 1
}