message: plugin-api: remove CreateStorageApiOptions type
diff: import { ApiRef, createApiRef } from '../system';
  import { Observable } from '../../types';
  -import { ErrorApi } from './ErrorApi';
  export type StorageValueChange<T = any> = {
  key: string;
  newValue?: T;
  };
  -export type CreateStorageApiOptions = {
  - errorApi: ErrorApi;
  - namespace?: string;
  -};
  -
  export interface StorageApi {
  /**
  * Create a bucket to store data in.
  