rely on preinstalled rustup on windows-arm

Author: RalfJung

.github/workflows/ci.yml

@@ -69,12 +69,6 @@ jobs:
           sudo apt update
           # Install needed packages
           sudo apt install $(echo "libatomic1: zlib1g-dev:" | sed 's/:/:${{ matrix.multiarch }}/g')
-      - name: Install rustup on Windows ARM
-        if: ${{ matrix.os == 'windows-11-arm' }}
-        run: |
-            curl -LOs https://static.rust-lang.org/rustup/dist/aarch64-pc-windows-msvc/rustup-init.exe
-            ./rustup-init.exe -y --no-modify-path
-            echo "$USERPROFILE/.cargo/bin" >> "$GITHUB_PATH"
       - uses: ./.github/workflows/setup
         with:
           toolchain_flags: "--host ${{ matrix.host_target }}"