Centralize role/scopes comments

.taskcluster.yml

@@ -18,6 +18,8 @@ tasks:
         source: ${event.compare}
       scopes:
         - "queue:scheduler-id:taskcluster-github"
+
+        # Granted to role "repo:github.com/servo/servo-taskcluster-experiments:branch:master"
         - "queue:create-task:highest:aws-provisioner-v1/servo-*"
         - "docker-worker:cache:cargo-registry-cache"
         - "docker-worker:cache:cargo-git-cache"

decision-task/run.py

@@ -25,9 +25,6 @@ def create_task(name, command, artifacts=None, dependencies=None, env=None, cach
         "dependencies": [decision_task_id] + (dependencies or []),
         "schedulerId": "taskcluster-github",
         "provisionerId": "aws-provisioner-v1",
-
-        # Granted scope queue:create-task:highest:aws-provisioner-v1/servo-*
-        # to role repo:github.com/servo/servo-taskcluster-experiments:branch:master
         "workerType": "servo-docker-worker",
 
         "created": taskcluster.fromNowJSON(""),
@@ -96,10 +93,6 @@ build_task = create_task(
     ],
 
     # https://docs.taskcluster.net/docs/reference/workers/docker-worker/docs/caches
-    # For this to be allowed, I created role
-    # "repo:github.com/servo/servo-taskcluster-experiments:branch:master"
-    # with scope "assume:project:servo:grants/cargo-caches"
-    # at https://tools.taskcluster.net/auth/roles/
     scopes=[
         "docker-worker:cache:cargo-registry-cache",
         "docker-worker:cache:cargo-git-cache",