fix: remove drone

.drone.yml

@@ -1,37 +0,0 @@
----
-kind: pipeline
-name: update_version
-
-platform:
-  os: linux
-  arch: amd64
-
-trigger:
-  branch:
-    - main
-  event:
-    - cron
-  cron:
-    - update_version
-
-steps:
-  - name: update
-    image: alpine:3.17
-    pull: always
-    commands:
-      - apk add --no-cache curl
-      - ./bump_version.sh
-
-  - name: push
-    image: appleboy/drone-git-push:0.2.3-linux-amd64
-    pull: always
-    settings:
-      author_email: "teabot@gitea.io"
-      author_name: GiteaBot
-      branch: main
-      commit: true
-      commit_message: "[skip ci] Updated Version via cron"
-      remote: "git@gitea.com:gitea/homebrew-gitea.git"
-    environment:
-      GIT_PUSH_SSH_KEY:
-        from_secret: git_push_ssh_key