Strip comment when validating SSH keys (BB-7903)

Heyo -

I'm attempting to set up my SSH key, but the AJAX request from the modal window that saves the keys is getting a 400 error.

URI throwing error: https://bitbucket.org/!api/1.0/users/jamisonvalenta/ssh-keys

I can hit the URI by typing it into my browser(returns an empty JSON array), but the AJAX request is definitely failing (see attached screenshot)