docs: remove garbage

docs/install-node.rst

--Installation of a development node machine
--==========================================
--
--.. highlight:: bash
--
+Installation of a development node machine
+==========================================
+
+.. highlight:: bash
+
 
 Preparation
 -----------
@@ -93,4 +93,4 @@ Copy the upstart scripts for celery services::
 Start celery daemons::
 
   $ sudo start vmcelery
-  $ sudo start netcelery
+  $ sudo start netcelery
\ No newline at end of file