I haven’t tested it, but I think you should be able to update line 22:
from x.removeTags(x.tags)
to x.removeTags([tagNamed("Focus"), tagNamed("Seguintes"), tagNamed("Purgatório")])
Incidentally, that assumes that all four of the tags are on the top level of the tag hierarchy. If that’s not the case, you can chain multiple tagNamed arguments together to target the specific tag that you want.