ci: remove swigwin setup from workflows

.github/workflows/amd64_windows_cmake_python.yml

@@ -27,13 +27,6 @@ jobs:
           python-version: ${{ matrix.python.version }}
       - name: Install python3
         run: python3 -m pip install --user mypy-protobuf absl-py setuptools wheel numpy pandas
-      - name: Install SWIG 4.2.1
-        run: |
-          (New-Object System.Net.WebClient).DownloadFile("http://prdownloads.sourceforge.net/swig/swigwin-4.2.1.zip","swigwin-4.2.1.zip");
-          Expand-Archive .\swigwin-4.2.1.zip .;
-          echo "$((Get-Item .).FullName)/swigwin-4.2.1" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
-      - name: Check swig
-        run: swig -version
       - name: Add Python binaries to path
         run: >
           echo "$((Get-Item ~).FullName)/AppData/Roaming/Python/${{ matrix.python.dir }}/Scripts" |