remove 'yarn test' task (#78)

.taskcluster.yml

@@ -5,36 +5,6 @@ metadata:
   owner: '{{ event.head.user.email }}'
   source: '{{ event.head.repo.url }}'
 tasks:
-  - provisionerId: '{{ taskcluster.docker.provisionerId }}'
-    workerType: '{{ taskcluster.docker.workerType }}'
-    extra:
-      github:
-        events:
-          - pull_request.opened
-          - pull_request.synchronize
-          - pull_request.reopened
-          - push
-        branches:
-          - master
-    payload:
-      maxRunTime: 3600
-      image: 'node:6'
-      command:
-        - /bin/bash
-        - '--login'
-        - '-c'
-        - >-
-          git clone {{event.head.repo.url}} repo &&
-          cd repo &&
-          git config advice.detachedHead false &&
-          git checkout {{event.head.sha}} &&
-          yarn &&
-          yarn test
-    metadata:
-      name: taskcluster-client.py test run
-      description: Run library test suite
-      owner: '{{ event.head.user.email }}'
-      source: '{{ event.head.repo.url }}'
   - provisionerId: '{{ taskcluster.docker.provisionerId }}'
     workerType: '{{ taskcluster.docker.workerType }}'
     extra: