remove example tasks from tasks.yaml

Change-Id: I5dec8339df07f672bff93b1dc627e6dc71fc554c

tasks.yaml

@@ -1,26 +0,0 @@
-# WARNING: `tasks.yaml` will be deprecated in further releases.
-# Please, use `deployment_tasks.yaml` to describe tasks instead.
-
-# This tasks will be applied on controller nodes,
-# here you can also specify several roles, for example
-# ['cinder', 'compute'] will be applied only on
-# cinder and compute nodes
-- role: ['controller']
-  stage: post_deployment
-  type: shell
-  parameters:
-    cmd: bash deploy.sh
-    timeout: 42
-# Task is applied for all roles
-- role: '*'
-  stage: pre_deployment
-  type: shell
-  parameters:
-    cmd: echo all > /tmp/plugin.all
-    timeout: 42
-# "reboot" task reboots the nodes and waits until they get back online
-# - role: '*'
-#   stage: pre_deployment
-#   type: reboot
-#   parameters:
-#     timeout: 600