src/vs/platform/userDataSync/common/userDataSyncService.ts/UserDataSyncService/resetLocal
class UserDataSyncService:	async resetLocal(): Promise<void> {
		this.checkEnablement();
		this._lastSyncTime = undefined;
		this.storageService.remove(LAST_SYNC_TIME_KEY, StorageScope.APPLICATION);
		for (const [synchronizer] of this.activeProfileSynchronizers.values()) {
			try {
				await synchronizer.resetLocal();
			} catch (e) {
				this.logService.error(e);
			}
		}
		this.clearActiveProfileSynchronizers();
		this._onDidResetLocal.fire();
		this.logService.info('Did reset the local sync state.');
	}