followup: clean up dockerfiles and release yamls (#10783)

.github/workflows/release-docker-gb200.yml

@@ -1,31 +0,0 @@
-name: Release Docker Images (GB200)
-on:
-  workflow_dispatch:
-
-jobs:
-  publish:
-    if: github.repository == 'sgl-project/sglang'
-    runs-on: ubuntu-22.04-arm
-    environment: "prod"
-    steps:
-      - name: Delete huge unnecessary tools folder
-        run: rm -rf /opt/hostedtoolcache
-
-      - name: Checkout repository
-        uses: actions/checkout@v4
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Login to Docker Hub
-        uses: docker/login-action@v2
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
-      - name: Build and Push
-        run: |
-          version=$(cat python/sglang/version.py | cut -d'"' -f2)
-          tag=v${version}-cu129-gb200
-
-          docker buildx build --platform linux/arm64 --push --output type=image -t lmsysorg/sglang:${tag} -f docker/Dockerfile.gb200 --build-arg CUDA_VERSION=12.9.1 --build-arg BUILD_TYPE=blackwell_aarch64 --no-cache .