Remove entries from a feature state map.
Remove a specified entry or all entries from a feature's state map, depending on the value of stateKey.
Note that updates to feature state are asynchronous, so changes made by this method migth not be immediately visible using getStateFeature().
Identifier of the feature whose state should be removed.
Style source identifier.
Style source layer identifier (for multi-layer sources such as vector sources).
Key of the entry to remove. If empty, the entire state is removed.