remove usage of msvc-dev-cmd in github actions

.github/workflows/vs2019.yml

@@ -17,10 +17,9 @@ jobs:
     strategy:
       matrix:
         arch:
+          - x86
           - amd64
-          - amd64_x86
         compiler:
-          # TODO: Add clang when bootstrap.bat adds clang support.
           - msvc
     name: ${{ matrix.arch }} - ${{ matrix.compiler }}
     runs-on: windows-2019
@@ -29,9 +28,6 @@ jobs:
         shell: cmd
     steps:
       - uses: actions/checkout@v4
-      - uses: ilammy/msvc-dev-cmd@v1
-        with:
-          arch: ${{ matrix.arch }}
       - name: bootstrap
         run: >
           bootstrap.bat build

bootstrap.bat

@@ -10,11 +10,13 @@ if "%~1" == "" goto :usage
 where cl >nul 2>nul
 if %ERRORLEVEL%==0 goto :build
 
+if "%~2" == "" (set arch=amd64) else (set arch=%~2)
+
 :: Attempt to run vcvarsall if cl was not found.
 for /f "tokens=*" %%g in (
 '"C:\Program Files (x86)\Microsoft Visual Studio\Installer\vswhere.exe" -latest -property installationPath'
 ) do (set installation_path=%%g)
-call "%installation_path%\VC\Auxiliary\Build\vcvarsall" x64
+call "%installation_path%\VC\Auxiliary\Build\vcvarsall" %arch%
 
 :build