Hi @nicktv,
I hope you are well today and thank you for your question.
I think you are talking about the Google+ log in button displayed by the Appointments plugin. If this is the case then you can hide this button by adding the following CSS code in the style.css file of your child theme or adding the CSS code in the appointment plugin “Additional css Rules” option on the following path.
Admin Area -> Appointments -> Settings -> General -> Display Settings
a.appointments-login_link.appointments-login_link-google {
display: none;
}
If you are not talking about this button then please share me the page URL from your site where it is displaying so that i can provide you the solution to hide it.
Kind Regards,
Vinod Dalvi