Problem with extensions with save as

Hello, I would like to delete some extensions that I do not use when saving as … That is to say that the list is very big for me and I would prefer to have only the extensions that I use.
How can I eliminate the ones I do not use?

Hola, me gustaria eliminar algunas extensiones que no uso a la hora de guardar como… Es decir que la lista es muy grande para mi y preferiria tener solo las extensiones que uso.
Yo sólo guardo en png y aseprite.
¿Como puedo eliminar las que no uso?.

You cannot delete extensions from the list. However, if you don’t select anything from the list and type in the extension you want, it saves correctly, and you don’t need to use the list at all.