Removes a set of values from a given key. If all values associated with a key are removed, then the key is removed also.

Removes the key (and associated value) from the underlying dictionary of this view. If no key in the view is equal to the passed key, the dictionary and view are unchanged.

Removes the key and value from the underlying dictionary of this view. that is equal to the passed in key. If no key in the view is equal to the passed key, or has the given value associated with it, the dictionary and view are unchanged.