made valid

codecov.yml

@@ -1,6 +1,5 @@
 codecov:
   branch: master
-  bot: null
 
 coverage:
   precision: 2
@@ -15,54 +14,14 @@ coverage:
         branches: null
         attachments: "sunburst, diff"
 
-    hipchat:
-      default:
-        url: null
-        notify: no
-        threshold: null
-        branches: null
-        card: yes
-        only_pulls: null
-        message: null
-
-    gitter:
-      default:
-        url: null
-        threshold: null
-        branches: null
-        message: null
-
-    webhook:
-      default:
-        url: null
-        threshold: null
-        branches: null
-        only_pulls: null
-
-    irc:
-      default:
-        server: null
-        branches: null
-        threshold: null
-        message: null
-
   status:
     project:
       default:
         target: auto
-        threshold: null
-        branches: null
 
     patch:
       default:
         target: auto
-        branches: null
-
-    changes:
-      default:
-        branches: null
-
-  ignore: null
 
 comment:
   layout: "header, diff, changes, sunburst, uncovered"