remove drone file

.drone.yml

-kind: pipeline
-name: default
-
-platform:
-  os: linux
-  arch: amd64
-
-clone:
-  disable: true
-
-steps:
-- name: hg
-  pull: default
-  image: plugins/hg
-
-- name: flake8
-  depends:
-  - hg
-  pull: always
-  image: xcgd/flake8:3
-  commands:
-  - flake8
-
-- name: isort
-  depends:
-  - hg
-  pull: always
-  image: xcgd/isort:odoo
-  commands:
-  - isort -c -df
-
-- name: docker
-  depends:
-  - flake8
-  - isort
-  pull: default
-  image: plugins/docker
-  settings:
-    dockerfile: Dockerfile
-    repo: xcgd/odoo_scripts
-    tags:
-    - latest
-    username:
-      from_secret: docker_username
-    password:
-      from_secret: docker_password
-
-- name: mattermost
-  depends:
-  - docker_docker_build_copy
-  - docker_import_csv
-  pull: default
-  image: plugins/slack
-  settings:
-    channel:
-      from_secret: slack_channel
-    username: drone
-    webhook:
-      from_secret: slack_webhook
-  when:
-    status:
-    - failure
-    - success