[NFC] Stop passing no-longer-part-of-signature variable

[eileenmcnaughton]

Overview

Stop passing a parameter no longer in the function signature

Before

CRM_Member_BAO_MembershipLog::add($membershipLog, CRM_Core_DAO::$_nullArray);

After

CRM_Member_BAO_MembershipLog::add($membershipLog);

Technical Details

the function now only takes one variable

Comments

This is a partial reviewers commit on #11556 - adding merge on pass

[civibot]

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