src/vs/platform/userDataSync/common/userDataSyncService.ts/ManualSyncTask/discard
class ManualSyncTask:	async discard(resource: URI): Promise<[SyncResource, ISyncResourcePreview][]> {
		try {
			return await this.performAction(resource, sychronizer => sychronizer.discard(resource));
		} catch (error) {
			this.logService.error(error);
			throw error;
		}
	}