ci: disable outdated Angular robot merge and triage behavior

The issue triage behavior is no longer used within this repository.
For the merge behavior, only the label status checks are potentially
beneficial but they are already checked via the `ng-dev` tooling
when merging.

Author: clydin

.github/angular-robot.yml

@@ -5,7 +5,7 @@ merge:
   # the status will be added to your pull requests
   status:
     # set to true to disable
-    disabled: false
+    disabled: true
     # the name of the status
     context: 'ci/angular: merge status'
     # text to show when all checks pass
@@ -60,7 +60,7 @@ merge:
 # options for the triage plugin
 triage:
   # set to true to disable
-  disabled: false
+  disabled: true
   # number of the milestone to apply when the issue has not been triaged yet
   needsTriageMilestone: 11,
   # number of the milestone to apply when the issue is triaged