Remove badge of non-longer existing service.

README.rst

@@ -1,7 +1,7 @@
 rdata
 =====
 
-|build-status| |docs| |coverage| |landscape| |pypi| |zenodo|
+|build-status| |docs| |coverage| |pypi| |zenodo|
 
 Read R datasets from Python.
 
@@ -123,10 +123,6 @@ Pandas `Categorical` objects:
     :scale: 100%
     :target: https://codecov.io/gh/vnmabus/rdata/branch/develop
 
-.. |landscape| image:: https://landscape.io/github/vnmabus/rdata/develop/landscape.svg?style=flat
-   :target: https://landscape.io/github/vnmabus/rdata/develop
-   :alt: Code Health
-
 .. |pypi| image:: https://badge.fury.io/py/rdata.svg
     :alt: Pypi version
     :scale: 100%