How do I remove my custom data I created in my parent theme

Good day- Not realizing that bp business is actually a parent I did my customization in there.

I deleted bp business and uploaded fresh copies from the zip that now show
/bp-business child/ in the /theme/ folder
... So business and child are at the same level in /theme
I can now select the child as the theme I want to work with
but the duplicate data still exists when working with this theme
How do I undo all the parent work ?