rm downloads badge from README.rst [ci skip]

README.rst

@@ -12,8 +12,6 @@
    :target: https://gitlab.idiap.ch/bob/bob.pad.voice
 .. image:: http://img.shields.io/pypi/v/bob.pad.voice.png
    :target: https://pypi.python.org/pypi/bob.pad.voice
-.. image:: http://img.shields.io/pypi/dm/bob.pad.voice.png
-   :target: https://pypi.python.org/pypi/bob.pad.voice
 
 =================================================
 Presentation Attack Detection in Voice Biometrics
@@ -47,4 +45,4 @@ development `mailing list`_.
 .. Place your references here:
 .. _bob: https://www.idiap.ch/software/bob
 .. _installation: https://gitlab.idiap.ch/bob/bob/wikis/Installation
-.. _mailing list: https://groups.google.com/forum/?fromgroups#!forum/bob-devel
\ No newline at end of file
+.. _mailing list: https://groups.google.com/forum/?fromgroups#!forum/bob-devel