How to tell if a listfile entry is invalid?

[Apple]

as title says, how to tell if listfile have useless name so i could manually delete them.
All I know are these extension used by wc3
[.ogg] [.wav] [.w3x] [.w3m] [.mdx] [.mdl] [.blp]
besides these (listfile) (attributes) ,
if the names in listfile.txt does not have extension does it mean that they are totally useless?

[UndeadxAssassin]

Chances are, if it's in the listfile (unless you added it yourself), it was probably used somewhere before and would then be considered 'not useless'.

I do occasionally see some that don't have an extension, though, so not all of them are useless. There's no harm in removing them, though, if you think you aren't going to run into it anymore.

[Apple]

Chances are, if it's in the listfile (unless you added it yourself), it was probably used somewhere before and would then be considered 'not useless'.

I do occasionally see some that don't have an extension, though, so not all of them are useless. There's no harm in removing them, though, if you think you aren't going to run into it anymore.

Thanks.