refactor: remove unnecessary Docker service and container definitions

.gitea/workflows/docker-build-push.yml

@@ -12,18 +12,6 @@ env:
 jobs:
   docker:
     runs-on: docker
-    container:
-      image: docker:27-cli
-      env:
-        DOCKER_HOST: tcp://docker:2375
-        DOCKER_TLS_CERTDIR: ""
-        DOCKER_BUILDKIT: "1"
-    services:
-      docker:
-        image: docker:27-dind
-        options: --privileged
-        env:
-          DOCKER_TLS_CERTDIR: ""
     steps:
       - name: Checkout (git)
         env: