Remove drone file

.drone.yml

@@ -1,40 +0,0 @@
-kind: pipeline
-type: docker
-name: default
-
-steps:
-  - name: build cpp-ubuntu
-    image: docker
-    commands:
-      - docker build -t erki/cpp-ubuntu:latest -f cpp-ubuntu.Dockerfile .
-    volumes:
-      - name: docker_socket
-        path: /var/run/docker.sock
-
-  - name: build jenkins-ubuntu
-    image: docker
-    commands:
-      - docker build -t erki/jenkins-ubuntu:latest -f jenkins-ubuntu.Dockerfile .
-    volumes:
-      - name: docker_socket
-        path: /var/run/docker.sock
-
-  - name: notify
-    image: plugins/matrix
-    settings:
-      homeserver:
-        from_secret: matrix_homeserver
-      roomid:
-        from_secret: matrix_roomid
-      username:
-        from_secret: matrix_username
-      password:
-        from_secret: matrix_password
-    when:
-      status:
-      - failure
-
-volumes:
-  - name: docker_socket
-    host:
-      path: /var/run/docker.sock