Fix some type mismatch, if there are no links

[fabicsp]

Since the links has the following type:

readonly items: PaginationObject[];
readonly meta: T;
readonly links?: IPaginationLinks;

And in some use case you can get the following response: const response = { items: [], meta: { ... }, links: "" }

In the scope of this PR i'm gona totally remove the links property from the response object, because it's an optional property on the type definitions, and nothing to do with empty strings. const response = { items: [], meta: { ... } }.