Remove custom clone override, use built-in Woodpecker clone

.woodpecker/frontend.yml

@@ -2,24 +2,7 @@ when:
   - event: push
     branch: master
 
-
-clone:
-  git:
-    image: alpine
-    commands:
-      - "echo clone-placeholder"
-
 steps:
-  - name: clone
-    image: alpine
-    environment:
-      GITHUB_TOKEN:
-        from_secret: github-token
-    commands:
-      - "apk update && apk add git"
-      - 'for i in 1 2 3 4 5; do git clone https://x-access-token:${GITHUB_TOKEN}@github.com/${CI_REPO} . && break || echo "Clone attempt $i failed, retrying in 10s..." && rm -rf .git && sleep 10; done'
-      - "git checkout $CI_COMMIT_SHA"
-
   - name: install-frontend-deps
     image: node:24-alpine
     environment: