[CI/CD] Just remove the sync-stable-branch step.

.drone.yml

@@ -29,29 +29,6 @@ steps:
   commands:
     - . .drone/github-mirror.sh
 
-###
-### Synchronize the `stable` branch to the new release
-###
-
-- name: sync-stable-branch
-  image: alpine
-  environment:
-    SSH_PUBKEY:
-      from_secret: ssh_pubkey
-    SSH_PRIVKEY:
-      from_secret: ssh_privkey
-    PGP_KEY:
-      from_secret: pgp_key
-    PGP_KEY_ID:
-      from_secret: pgp_key_id
-
-  commands:
-    - . .drone/sync-stable-branch.sh
-
-  when:
-    event:
-      - tag
-
 ###
 ### Rebuild the docs
 ###

.drone/sync-stable-branch.sh

@@ -1,19 +0,0 @@
-#!/bin/sh
-
-. .drone/macros/configure-git.sh
-. .drone/macros/configure-ssh.sh
-. .drone/macros/configure-gpg.sh
-
-# Git configuration
-git remote rm origin
-git remote add origin git@git.platypush.tech:platypush/platypush.git
-git fetch origin
-
-# Merge and push to the `stable` branch
-git checkout stable || git checkout -b stable
-git rebase master
-git push -u origin stable
-git checkout master
-
-# Restore the original git configuration
-mv "$TMP_GIT_CONF" "$GIT_CONF"