Remove google fonts by editing functions.php

Hi K,
Knowing it’s a late reply but here are a few options:

1. Create a child theme and add the code below to the functions.php
2. Create a custom code snippet plugin and add the code below in there.

function wpgf_dequeue_google_fonts() {
    wp_dequeue_style( 'lovecraft_googlefonts' );
}
add_action( 'wp_enqueue_scripts', 'wpgf_dequeue_google_fonts', 20 );

May I ask why you don’t want to use a plugin for this?