How can I hide entries in dashlet select list?

Hell,

I would like to customize the list when adding dashlets. So if I click on Add dashlet, in the future, for example, the entry "Twitter" should no longer appear.

Now I came across an article at stackoverflow.com/.../52336407 that describes exactly this. This also works. However, I want to hide multiple dashlets and my attempts failed or JS knowledge is too weak that I managed to include multiple entries to be suppressed in the JS.

Do you have any idea here or maybe another approach?

Thanks and best regards

Martin