MAINT: remove warning from README
# Altair
-**WARNING: As of 2/10/2018, the master branch of this repository is under
-construction as we reorganize and refactor for the upcoming 2.0 release.
-The 2.x series of Altair will have full support for VegaLite 1.0/2.0 and Vega
-2.0/3.0, along with support for an extensible rendering system to enable
-Altair to work in any frontend (Jupyter Notebook, JupyterLab, nteract,
-Colaboratory, Zeppelin, etc.). We have created a 1.x
-branch for maintenance of the 1.x series.**
-
[![build status](http://img.shields.io/travis/altair-viz/altair/master.svg?style=flat)](https://travis-ci.org/altair-viz/altair)
Altair is a declarative statistical visualization library for Python.
