delete abstract method
Beta: Performs the following write-only operations in memory and later flushes
This can be used to improve speed on many small write operations
Deletes the given key from the box.
If it does not exist, nothing happens.
Implementation
// Future<void> transaction(Future<void> Function() operation);
/// Deletes the given [key] from the box.
///
/// If it does not exist, nothing happens.
Future<void> delete(
dynamic key, {
bool notify = true,
});