Revert #426 (#435)

This reverts commit 6a36fd623a.

.drone.yml

@@ -263,69 +263,6 @@ trigger:
   event:
     - promote
 
----
-kind: pipeline
-type: docker
-name: OSS Release (arm64)
-platform:
-  os: linux
-  arch: arm64
-
-steps:
-  - name: Check Promote
-    image: alpine
-    commands:
-      - if [ -z "$DRONE_DEPLOY_TO" ]; then echo "Missing DRONE_DEPLOY_TO (Target)"; exit 1; fi
-      - if [ -z "$DRONE_TAG" ]; then echo "Missing DRONE_TAG"; exit 1; fi
-      - echo Promoting $DRONE_TAG to $DRONE_DEPLOY_TO
-
-  - name: Image Tag
-    image: alpine
-    commands:
-      - apk add --no-cache bash git sed
-      - git fetch origin --tags
-      - chmod +x ./tools/image-tag.sh
-      - echo $(./tools/image-tag.sh)
-      - echo $(./tools/image-tag.sh) > .tags
-      - if [ -z "$DRONE_TAG" ]; then echo "No tag, not modifying version"; else sed "0,/VERSION.*/ s/VERSION.*/VERSION = \"${DRONE_TAG}\"/g" engine/settings/base.py > engine/settings/base.temp && mv engine/settings/base.temp engine/settings/base.py; fi
-      - cat engine/settings/base.py | grep VERSION | head -1
-    depends_on:
-      - Check Promote
-    when:
-      event:
-        - promote
-      target:
-        - oss
-      ref:
-        - refs/tags/v*.*.*
-
-  - name: Build and Push Engine Docker Image Backend to Dockerhub
-    image: plugins/docker
-    settings:
-      repo: grafana/oncall
-      dockerfile: engine/Dockerfile
-      context: engine/
-      password:
-        from_secret: docker_password
-      username:
-        from_secret: docker_username
-    depends_on:
-      - Image Tag
-
-  - name: Unrecognized Promote Target
-    image: alpine
-    commands:
-      - echo $DRONE_DEPLOY_TO is not a recognized promote target!
-      - exit 1
-    when:
-      target:
-        exclude:
-          - oss
-
-trigger:
-  event:
-    - promote
-
 ---
 # Secret for pulling docker images.
 kind: secret