Skip to use cache when building docker image in Woodpecker CI.

Since the disk quota is run out, we cannot download, use and upload cache. Maybe
in the future we can use MinIO as cache directly but it seems hard to configure.

Author: hzhangxyz

.woodpecker/docker.yml

@@ -2,17 +2,6 @@ when:
   - event: push
   - event: pull_request
 
-variables:
-  - &docker_config
-    DOCKER_CACHE: /woodpecker/cache/docker
-  - &minio_config
-    MINIO_HOST: https://s3.kclab.cloud
-    MINIO_ACCESS_KEY:
-      from_secret: minio_access_key
-    MINIO_SECRET_KEY:
-      from_secret: minio_secret_key
-    MINIO_BUCKET: cache-53030
-
 clone:
   git:
     image: woodpeckerci/plugin-git:2.6
@@ -21,17 +10,6 @@ clone:
       partial: false
 
 steps:
-  - name: open cache
-    image: minio/mc:latest
-    environment:
-      <<: [*docker_config, *minio_config]
-    commands:
-      - mkdir --parents $${DOCKER_CACHE}
-      - touch $${DOCKER_CACHE}/.keep
-      - mc alias set minio $${MINIO_HOST} $${MINIO_ACCESS_KEY} $${MINIO_SECRET_KEY}
-      - mc cp --recursive minio/$${MINIO_BUCKET}/${CI_REPO}/docker/ $${DOCKER_CACHE}/
-    failure: ignore
-
   - name: tagging
     image: mcp/git:latest
     commands:
@@ -46,20 +24,8 @@ steps:
         from_secret: gitea_package
       registry: git.kclab.cloud
       tags_file: .tag
-      cache-to: type=local,dest=/woodpecker/cache/docker
-      cache-from:
-        - type=local\\,src=/woodpecker/cache/docker
       buildkit_config: |
         [registry."docker.io"]
         mirrors = ["https://docker.mirrors.kclab.cloud/"]
       build_args:
         PYPI_MIRROR: https://mirrors.ustc.edu.cn/pypi/simple
-
-  - name: save cache
-    image: minio/mc:latest
-    environment:
-      <<: [*docker_config, *minio_config]
-    commands:
-      - mc alias set minio $${MINIO_HOST} $${MINIO_ACCESS_KEY} $${MINIO_SECRET_KEY}
-      - mc cp --recursive $${DOCKER_CACHE}/ minio/$${MINIO_BUCKET}/${CI_REPO}/docker/
-    failure: ignore