Hello @vzoriy, apologies for the confusion, it uses filters you would insert to your functions.php. However, I’d suggest using Custom CSS for this one to make it easier for you.
Go to Appearances → Customize → Additional CSS and insert this Custom CSS here:
.tribe-events-c-subscribe-dropdown__container {
display: none !important;
}
Moreover, you could also try installing this third-party plugin that allows you to insert code snippets on your website → https://www.ads-software.com/plugins/code-snippets/.
It should work after applying this snippet, make sure to clear the cache after. Moreover, You can check our Themer’s Guide to learn more about implementing CSS customization → https://theeventscalendar.com/knowledgebase/knowledgebase-category/customizing/.
Let me know how it goes.
Best,
Abz