Remove unused store_user_commitment method
Remove unused store_user_commitment method

Dwin357/HiveCHI-rwm,MozillaHive/HiveCHI-rwm,iamstephenliu/HiveCHI-rwm,MozillaHive/HiveCHI-rwm,MozillaHive/HiveCHI-rwm,Dwin357/HiveCHI-rwm,iamstephenliu/HiveCHI-rwm,Dwin357/HiveCHI-rwm,MozillaHive/HiveCHI-rwm,iamstephenliu/HiveCHI-rwm,iamstephenliu/HiveCHI-rwm,Dwin357/HiveCHI-rwm