LGTM: Remove analysis for Python

[Mugen87]

Since the removal of the Blender JSON exporter removed most of the project's Python code as well, I think we can safely disable the respective code analysis.

[mrdoob]

I don't think that is something that can be configured...?

[Mugen87]

Oh, I was not aware of that. I thought there was some kind of language setting.

[mrdoob]

After #14308 ✌️

[Mugen87]

I like that yellow color 😊

[mrdoob]

https://twitter.com/lgtmhq/status/1008819464907812864