Remove the badges

They are now living directly in the gitlab instance.

README.md

@@ -6,9 +6,6 @@
                        
 ```
 
-[![pipeline status](https://0xacab.org/jvoisin/mat2/badges/master/pipeline.svg)](https://0xacab.org/jvoisin/mat2/commits/master)
-[![coverage report](https://0xacab.org/jvoisin/mat2/badges/master/coverage.svg)](https://0xacab.org/jvoisin/mat2/commits/master)
-
 This software is currently in **beta**, please don't use it for anything
 critical.