Remove heavy TF model from git history

[EiffL]

@modichirag The folder models is too heavy to be stored directly on git, it makes downloading the project way too slow. I'm going to go ahead and erase it from history, we can always add this back as a git-lfs folder afterwards

[EiffL]

Ok, done. the repo is now 1.4MB instead of 200MB ^^'

But careful, yuo need to start from a clean repo now.