CI: Don't setup developer command prompt

The action used to do it hasn't seen an update since 2021, and Ninja
builds are currently broken on Windows. Also, IIRC you don't need to
setup a VS developer environment since that should already be taken care
of by MSBuild.

Signed-off-by: Avery King <avery98@pm.me>

.github/workflows/cmake_build.yml

@@ -127,13 +127,6 @@ jobs:
         p12-file-base64: ${{ secrets.APPLE_CERTIFICATE }}
         p12-password: ${{ secrets.APPLE_CERTIFICATE_PASSWORD }}
 
-    # required for CMake to find Ninja
-    - name: "[Windows] Set up MSVC Developer Command Prompt"
-      if: runner.os == 'Windows'
-      uses: seanmiddleditch/gha-setup-vsdevenv@v4
-      with:
-        arch: ${{ matrix.config.arch }}
-
     - name: Get Git commit of vcpkg submodule
       run: echo VCPKG_COMMIT=$(git ls-tree HEAD vcpkg | awk '{print $3}') >> ${GITHUB_ENV}