CI: drop the Windows toolchains workflow (refs #1886)

.github/workflows/windows-toolchains.yml

@@ -1,82 +0,0 @@
-# Windows builds with the toolchains contributors use, not just the MSVC one releases use: build
-# the desktop app and the CLI with MSVC, with GNU (mingw-w64 from MSYS2, the setup CONTRIBUTING.md
-# describes), and with GNU linked by Rust's bundled LLD plus the mingw-w64 import libraries its
-# self-contained sysroot lacks (#1886), then run each binary with `--version`. Both packages build
-# in one `cargo build`, the way people build them, so features unify and the CLI links everything
-# the desktop app pulls in.
-name: Windows toolchains
-
-# Nightly on main (a dependency update is what brings in a new system library), and on PRs that
-# change this workflow or the lockfile.
-on:
-  schedule:
-    - cron: "41 5 * * *"
-  pull_request:
-    paths:
-      - .github/workflows/windows-toolchains.yml
-      - Cargo.lock
-  workflow_dispatch:
-
-concurrency:
-  group: windows-toolchains-${{ github.ref }}
-  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
-
-permissions:
-  contents: read
-
-jobs:
-  build:
-    name: ${{ matrix.name }}
-    runs-on: windows-latest
-    timeout-minutes: 90
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - { name: msvc, target: x86_64-pc-windows-msvc }
-          - { name: gnu, target: x86_64-pc-windows-gnu }
-          - { name: gnu-rust-lld, target: x86_64-pc-windows-gnu, rust-lld: true }
-    defaults:
-      run:
-        shell: bash
-    steps:
-      # Build scripts run as this job's user; nothing here pushes, so don't leave the token on disk.
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          persist-credentials: false
-      - name: Rust (stable-${{ matrix.target }})
-        run: |
-          rustup toolchain install stable-${{ matrix.target }} --profile minimal --no-self-update
-          rustup default stable-${{ matrix.target }}
-          rustc -vV
-      - name: mingw-w64 from MSYS2
-        if: matrix.target == 'x86_64-pc-windows-gnu'
-        run: /c/msys64/usr/bin/pacman -Sy --noconfirm --needed mingw-w64-x86_64-gcc
-      - name: Put it first on PATH
-        if: matrix.target == 'x86_64-pc-windows-gnu' && !matrix.rust-lld
-        run: |
-          printf '%s\n' 'C:\msys64\mingw64\bin' >> "$GITHUB_PATH"
-      # Only the import libraries the self-contained sysroot lacks, in a folder of its own: with all
-      # of mingw-w64's lib folder on the search path, its C runtime mixes with Rust's bundled one
-      # (undefined `DllEntryPoint`). webbrowser, which opens links, binds shlwapi; winsafe, which the
-      # updater (craft-update) uses, binds shlwapi, ktmw32, propsys and version.
-      - name: Link with Rust's bundled LLD and mingw-w64's missing import libraries
-        if: matrix.rust-lld
-        run: |
-          mkdir -p /c/gnu-import-libs
-          for lib in shlwapi ktmw32 propsys version; do
-            cp "/c/msys64/mingw64/lib/lib$lib.a" /c/gnu-import-libs/
-          done
-          echo 'CARGO_TARGET_X86_64_PC_WINDOWS_GNU_LINKER=rust-lld' >> "$GITHUB_ENV"
-          echo 'CARGO_TARGET_X86_64_PC_WINDOWS_GNU_RUSTFLAGS=-C link-self-contained=yes -L native=C:/gnu-import-libs' >> "$GITHUB_ENV"
-      - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
-        with:
-          key: ${{ matrix.name }}
-      - name: Build the desktop app and the CLI
-        run: |
-          gcc --version | head -1 || true
-          cargo build --locked --target ${{ matrix.target }} -p effectcraft -p effectcraft-cli
-      - name: Run them
-        run: |
-          target/${{ matrix.target }}/debug/effectcraft.exe --version
-          target/${{ matrix.target }}/debug/effectcraft-cli.exe --version