ACE contract does not use IACE interface

[jlcs-es]

Reading the Solidity code, I noticed that the ZKAssetBase uses IACE as the interface to call the ACE.

Nonetheless, the ACE implementation does not inherit from IACE:

contract ACE is IAZTEC, Ownable, NoteRegistryManager {

https://github.com/AztecProtocol/AZTEC/blob/develop/packages/protocol/contracts/ACE/ACE.sol#L35

Neither do IAZTEC, Ownable nor NoteRegistryManager.