Remove tox.ini as it is currently not used
Remove tox.ini as it is currently not used

As discussed in [1], tox.ini is not currently being used effectively.
Therefore, it is currently being removed from the repo. If it is required
in the future, work on [1] can be continued.

[1]:https://review.openstack.org/#/c/264478/

Change-Id: I420087d4d4b99e9cb86be1a1cd6867a9fc866249

openstack/xstatic-jasmine,openstack/xstatic-jasmine,stackforge/xstatic-jasmine,stackforge/xstatic-jasmine