Unused Like Struct in LikeRegistry

Description

LikeRegistry defines a Like struct:

However, the contract never instantiates, stores, or returns this struct. The active like/match flow relies on likes mapping and matches arrays instead.

This leaves Like as unused code, which can mislead reviewers about expected storage design and increases code noise.

Risk

Likelihood: High

The unused declaration is always present in the current implementation.

Impact: Low

This is a maintainability and clarity issue, not a direct exploitable vulnerability.

Proof of Concept

Static usage check:

Expected output pattern shows only the declaration location and no operational usage.

Recommended Mitigation

Remove the unused struct if it is not part of near-term functionality:

If historical like records are planned, implement full storage and retrieval paths that actually use this structure.