Unreversable Actions

Submitted by (1) 0x52

Summary:

https://code4rena.com/reports/2022-08-rigor/#m-20-projectsol-and-communitysol-have-no-way-to-revoke-a-hash-in-approvedhashes

https://code4rena.com/reports/2022-08-rigor/#04 https://code4rena.com/reports/2022-08-rigor/#06

Mitigation: