src/vs/platform/quickinput/browser/commandsQuickAccess.ts/CommandsHistory/clearHistory
class CommandsHistory:	static clearHistory(configurationService: IConfigurationService, storageService: IStorageService): void {
		const commandHistoryLength = CommandsHistory.getConfiguredCommandHistoryLength(configurationService);
		CommandsHistory.cache = new LRUCache<string, number>(commandHistoryLength);
		CommandsHistory.counter = 1;

		CommandsHistory.saveState(storageService);
	}