Hello!
This is because this style follows the guidelines for APA 6th, which recommends the use of Author Initials in the text for clarity, beyond simply disambiguation.
The instructions provided in this knowledgebase article…
… provide instructions for disabling this option in a custom version of the style.
The custom style created by that process will allow you to reformat, to automatically remove those initials.
I do hope this helps.
Thanks!
Steve