Revert "Use dind for dry-run"

This reverts commit bf8f09cf98.

.woodpecker/docker.yaml

@@ -15,11 +15,14 @@ variables:
 
 steps:
   test-build:
-    image: docker:27-dind
-    commands:
-      - docker build -t source.hodakov.me/hdkv/phpbb:${CI_COMMIT_SHA:0:10} .
-    volumes:
-      - /var/run/docker.sock:/var/run/docker.sock
+    image: woodpeckerci/plugin-docker-buildx:5.1.0
+    privileged: true
+    settings:
+      dockerfile: Dockerfile
+      platforms: ${platform}
+      dry_run: true
+      repo: *repo
+      auto_tag: true
     when:
       event: pull_request