How Skip the Madatory part (Abstract and Email ids) at 3.0.2 OJS

Dear All,
We are using OJS 3.0.2 . Hosted two review journals. This journals has been earlier in print form. Now We are planning to hosted in online platform. As, We are not mandatory of abstract . I am trying skip some mandatory parts such as Abstract and Email ids. Please anyone can help me . How can I skip these mandatory filed.

With reagards,