refactor: remove preflight registry check and authentication probes for simplification

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

@@ -135,27 +135,6 @@ jobs:
           echo "image_full=$IMAGE_FULL" >> "$GITHUB_OUTPUT"
           echo "tag_args=$TAG_ARGS" >> "$GITHUB_OUTPUT"
 
-      - name: Preflight registry check
-        env:
-          REGISTRY: ${{ steps.vars.outputs.registry }}
-        run: |
-          set -eu
-          echo "Probing https://$REGISTRY/v2/"
-          apk add --no-cache curl >/dev/null 2>&1 || true
-          curl -sSI "https://$REGISTRY/v2/" | awk '/HTTP\// || /WWW-Authenticate:/ || /Docker-Distribution-Api-Version:/' || true
-
-      - name: Registry auth probe (basic)
-        env:
-          REGISTRY: ${{ steps.vars.outputs.registry }}
-          REGISTRY_USERNAME: ${{ secrets.REGISTRY_USERNAME }}
-          REGISTRY_TOKEN: ${{ secrets.REGISTRY_TOKEN }}
-        run: |
-          set -eu
-          apk add --no-cache curl >/dev/null 2>&1 || true
-          USER_NAME="${REGISTRY_USERNAME:-$GITHUB_ACTOR}"
-          CODE=$(curl -sS -u "$USER_NAME:${REGISTRY_TOKEN}" -o /dev/null -w "%{http_code}" "https://$REGISTRY/v2/") || CODE=000
-          echo "Basic auth probe to https://$REGISTRY/v2/ returned HTTP $CODE"
-
       - name: Log in to Gitea Registry
         env:
           REGISTRY: ${{ steps.vars.outputs.registry }}