Remove downloads stats for now (#20)

Author: terrytangyuan

README.rst

@@ -1,4 +1,4 @@
-|Travis-CI Build Status| |License| |PyPI version| |PyPI downloads|
+|Travis-CI Build Status| |License| |PyPI version|
 
 metric-learn
 =============
@@ -67,5 +67,4 @@ more complete.
    :target: http://badges.mit-license.org
 .. |PyPI version| image:: https://badge.fury.io/py/metric-learn.svg
    :target: http://badge.fury.io/py/metric-learn
-.. |PyPI downloads| image:: https://img.shields.io/pypi/dm/metric-learn.svg
-   :target: https://pypi.python.org/pypi/metric-learn/
+