Hi and welcome 🙂
CSS is usually the way to go in this instance, but I wasn’t able to come up with a working solution in a timely manner, so what I’d do is copy the contents of /events-calendar-pro/src/views/modules/meta/additional-fields.php and paste them into a blank file. You can simply delete the “Other” text on line 18 which will yield the results you’re looking for.
<?php esc_html_e( 'Other', 'tribe-events-calendar-pro' ) ?>
Make sure and save this newly created file as [your-theme]/tribe-events/pro/modules/meta/additional-fields.php to avoid losing customizations. Refer to our Themer’s Guide for complete details. Due to your request relating to a theme customization, I’m not able to provide any assistance beyond this, so best of luck and thanks for choosing us for your events calendar needs. Cheers!