https://github.com/code-423n4/2024-07-reserve/blob/3f133997e186465f4904553b0f8e86ecb7bbacbf/contracts/libraries/Permit.sol#L17
PermitLib offers the requireSignature function, which calls isValidSignature if owner is a contract, and uses OZs isValidSignatureNow otherwise.
If we look at the isValidSignatureNow implementation of the imported OZ version, however, we can see that this, too, has a fallback call to IERC1271.isValidSignature.
The if isContract branch in requireSignature is therefore useless because its redundant with the other, more standard, branch and we therefore recommend removing it.
