N-01 Redundant Code

[sparrowDom]

Issue by Open Zeppelin team:
Multiple instances of redundant code were identified in the OUSD contract:

The initialize function cannot be executed since the contract was already initialized in previous versions. To avoid unnecessarily increasing code size, consider removing the function or commenting it out for future reference.
In the delegateYield function, checking both the yieldFrom/yieldTo mappings and the rebaseState mapping is redundant, as the first check will only pass if the second passes, and vice versa. Consider removing the first check, as it involves more storage reads than the second one.
In the undelegateYield function, there is no need to set the credit balance of the delegation source, as it was already set to their balance within delegateYield.
Consider removing these redundancies to enhance the clarity and efficiency of the codebase.

Origin comment:

• We require the initialize function for any future fresh token contract deploys that would extend OUSD.sol
• We recognize the redundancy of code in the delegateYield function and have intentionally written in that way in the spirit of code readability and defensive programming. The exaggeration of verbosity is in place to prevent any current or future changes that could introduce an error in this critical part.
• Redundant storage slot write in undelegateYield has been removed

[github-actions]

	Warnings
⚠️	👀 This PR needs at least 2 reviewers

Generated by 🚫 dangerJS against ba0cd4f

[clement-ux]

LGTM 👍

[DanielVF]

Perhaps we just make no changes on this one? Not sure it's worth it.