remove os.path.exists checks so we can also work with files over http

[rdkls]

I know you guys put those checks there to be safe, but the code seems to fail nicely enough if files don't exist without them =) I needed it just for my case, to work with files over HTTP (kinda cool!)

[x1ah]

+1，remove path check is better.

[rdkls]

I notice the CI failure isn't related to that code :/