[REF] Minor simplification

[eileenmcnaughton]

Overview

This code used to be shared with other functions. No longer, so we only need to return what is returned for
this form

Before

Array returned, but only membership used

After

Only membership returned

Technical Details

Comments

[civibot]

(Standard links)

• If this is your first pull-request for CiviCRM, please browse CONTRIBUTING.md for information about the development and testing processes.
• If you are reviewing this pull-request, you may wish to consult the test sites and the Review Standards (long template, short template).

[seamuslee001]

Changes look good to me merging