Remove IOwnable

[guidanoli]

📚 Context

IOwnable is the interface of the Ownable contract from OpenZeppelin.
It contains three functions: owner, transferOwnership, and renounceOwnership.
It is useful for interfaces of contracts that inherit from Ownable.
On contracts v2, there are two such contracts: Authority and Application.
With #410, Authority will be removed.
With #415, Application will no longer inherit from Ownable.
This renders the IOwnable interface useless on contracts v3.
This means that we can effectively remove it.

✔️ Solution

• Remove IOwnable