src/vs/platform/userDataSync/common/userDataSyncService.ts/UserDataSyncService/resetLocal
class UserDataSyncService:	async resetLocal(): Promise<void> {
		this.checkEnablement();
		this.storageService.remove(LAST_SYNC_TIME_KEY, StorageScope.GLOBAL);
		if (this.synchronizers.value) {
			for (const synchroniser of this.synchronizers.value.enabled) {
				try {
					await synchroniser.resetLocal();
				} catch (e) {
					this.logService.error(`${synchroniser.resource}: ${toErrorMessage(e)}`);
					this.logService.error(e);
				}
			}
			this.synchronizers.value = undefined;
		}
		this._onDidResetLocal.fire();
		this.logService.info('Did reset the local sync state.');
	}