Function deregister

deregister(): Promise<void>
API function to deregister a Dock provider.

Returns Promise<void>
a promise that resolves once the Dock provider is successfully deregistered.
Remarks
A Workspace Platform must be initialized, and the Dock provider must be registered for this function to take effect.

Throws
an error if the provider is not registered.
Example: Deregister a Dock provider.
```
import { Dock } from '@openfin/workspace';

await Dock.deregister();
```