Howdy Smyth,
I would love to help you with this.
I am not sure what old topic you are referring to, but all the same removing that field from the Community Events form should be a very easy theme override. If you are not already familiar with how to create a theme override, checkout the Themer’s Guide for a step-by-step walkthrough.
Now that you know how to override create one for this file /the-events-calendar-community-events/src/views/community/modules/cost.php . On line ~46 you will see the start of the Event Cost areas. Simply delete or comment out anything you don’t want. And it’s gone!
Does that all make sense? Will that work for you? Please let me know.
Cheers!
– Brook