ci: drop SWR credentials from OHOS PC Check (public image)

Author: yujiangtao

.github/workflows/ohos-pc-check.yml

@@ -18,9 +18,6 @@ jobs:
     runs-on: ubuntu-latest
     container:
       image: swr.cn-north-4.myhuaweicloud.com/bitfun/bitfun-ade-ohos-ci:20260818
-      credentials:
-        username: ${{ secrets.SWR_USERNAME }}
-        password: ${{ secrets.SWR_PASSWORD }}
     timeout-minutes: 60
     env:
       CARGO_INCREMENTAL: "0"