can`t remove selected face I was trying to remove selected face.

So I entered edit mode and selected designated faces



pressed delete (face) and got below result



I don`t know why vertexes and edges still exist

How to remove this completely?



I have uploaded my project file.it is from the C-130 model made by manilov.ap in https://skfb.ly/6OR7z. (CC BY 4.0)



do I missed something?
These are different objects.



You can edit them all together by selecting them and switching to edit mode.



By the way, Blender has .WRL importer:



but it seems to be broken for the recent versions.





Generally it is better to download original files from SketchFab because glTF messes them up.