To remove an item from a collection, call the PUT endpoint for that specific
type of item and pass along a list of collection IDs that does not include the
ID of the collection that needs to be removed.
The only collection that is available via the API is the “Favorites”
collection and therefore to remove an item from this collection can be
achieved by passing the API an empty array of collections.
Remove file from collection
To remove a file from a collection, call the PUT /files/:id API and pass an empty
array of collection IDs.
Remove folder from collection
To remove a folder from a collection, call the PUT /folders/:id API and pass an
empty array of collection IDs.
Remove web link from collection
To remove a web link from a collection, call the PUT /web_links/:id API and
pass an empty array of collection IDs.
