Dev環境取得直後にサンプルデータを消し込む方法

小ネタですが(Partner)Developer環境に初期投入されているサンプルデータを開発者コンソール Anonymous Windowから消し込む方法です。

List<Opportunity> oppList = [Select Id From Opportunity];
delete oppList;

List<Case> csList = [Select Id From Case];
delete csList;

List<Lead> ldList = [Select Id From Lead];
delete ldList;

List<Campaign> cpList = [Select Id From Campaign];
delete cpList;

List<Entitlement> eList = [Select Id From Entitlement];
delete eList;

List<Account> accList = [Select Id From Account];
delete accList;