api-client folder in git seems broken

For some reason the joindin/api-client folder in the vendor is
broken. With this commit we remove it and in the next we are going
to re-add it so we make sure it is recreated.
api-client folder in git seems broken

For some reason the joindin/api-client folder in the vendor is
broken. With the previous commit we remove it and in this we are going
to re-add it so we make sure it is recreated.