Update README.rst

Remove deprecated badges

Author: MKoesters

README.rst

@@ -3,21 +3,11 @@
 Introduction
 ############
 
-.. image:: https://travis-ci.org/pymzml/pymzML.svg?branch=master
-    :target: https://travis-ci.org/pymzml/pymzML
-
-.. image:: https://ci.appveyor.com/api/projects/status/e5reb5xw74jfqk2v/branch/dev?svg=true
-   :target: https://ci.appveyor.com/api/projects/status/e5reb5xw74jfqk2v/branch/dev?svg=true
-   :alt: AppVeyor CI status
 
 .. image:: https://readthedocs.org/projects/pymzml/badge/?version=latest
     :target: http://pymzml.readthedocs.io/en/latest/?badge=latest
     :alt: Documentation Status
 
-.. image:: https://codecov.io/gh/pymzml/pymzml/branch/master/graph/badge.svg
-    :target: https://codecov.io/gh/pymzml/pymzml
-    :alt: Code Coverage
-
 .. image:: https://img.shields.io/pypi/v/pymzML.svg
    :target: https://pypi.org/project/pymzML/