Revert "Test drone (#2582)"

This reverts commit 87c7ee5490.

.drone.yml

@@ -90,6 +90,16 @@ steps:
     image: plugins/docker
     settings:
       dockerfile: docker/dev/Dockerfile
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
+      repo: dessalines/lemmy
+      tags:
+        - dev
+    when:
+      event:
+        - cron
 
   - name: publish release docker image
     image: plugins/docker