Well, use a search, for example...
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iqs is often recommended to be deleted
statman to keep
...etc

In some another topic, it was discussed which uxes are the minimum necessary for the software to work. Try to find it by yourself

And again
Quote Originally Posted by Boki_Srb View Post
...If you are not sure about some, move it out of the folder, run the software, and if something is missing or will not start - return it.
Users who make complete skins could give answers
If they have the will to do so