remove drone CI flow

.drone.yml

@@ -1,33 +0,0 @@
----
-kind: pipeline
-type: docker
-name: default
-trigger:
-  branch:
-    - main
-
-steps:
-  - name: Build
-    image: klakegg/hugo:ext-alpine
-    commands:
-      - hugo version
-      - hugo --minify --destination /drone/src/build
-
-  - name: Upload
-    image: plugins/s3
-    settings:
-      bucket: strimertul-website
-      access_key:
-        from_secret: minio_access
-      secret_key:
-        from_secret: minio_secret
-      source: /drone/src/build/**/*
-      target: /
-      strip_prefix: /drone/src/build/
-      path_style: true
-      endpoint: https://artifacts.fromouter.space
----
-kind: signature
-hmac: 265b4e1a016720826585f17461a02c671f5a839dd35d098e34b49526a2279a24
-
-...