delete old code
delete old code

kmuto/review,orangain/review,kdmsnr/review,murashitas/review,orangain/review,krororo/review,takahashim/review,kmuto/review,kuad9/review_study,kmuto/review,suzuki/review,murashitas/review,takahashim/review,krororo/review,suzuki/review,masawada/review,masawada/review,krororo/review,kuad9/review_study