Delete identical files from 2 different locations

well I don't know how to describe my problem with just a few words so the title can be misleading. Sometimes I download a module, it's a zip file that I extract to 'my_folder' so it sound slike this:

my_folderpath1file1.txt

my_folderpath1file2.txt

my_folderpath2file3.txt

let's say I have another folder somewhere like this:

my_new_folderpath1file10.txt

my_new_folderpath2file20.txt

as you can see they don't have files in common, but they have path in common (path1 and path2 have the same name)

now I copy the full content of my_folder to my_new_folder, now my_new_folder looks like this,

my_new_folderpath1file1.txt

my_new_folderpath1file2.txt

my_new_folderpath1file10.txt

my_new_folderpath2file20.txt

my_new_folderpath2file3.txt

My question is, days after I did that, how can I automate the removal of all Files I have copied?

assuming 'my_folder' is still there, it could be used as a reference, to search in 'my_new_folder' all files with the same path/filename from 'my_new_folder', and remove them, so my_folder looks like this :

my_new_folderpath1file10.txt

my_new_folderpath2file20.txt

what matters is I can't only compare filename, I need to include the full path (except root) because maybe file1.txt exists in multiple folders (someone create a file with the same name in path3 for instance), but then I want to keep my_new_folderpath3file1.txt and only remove my_new_folderpath1file1.txt

thanks for any help, Rod