ci.yml: Don't cache windows build

Attempt to fix the failing CI for the short term.

The existing workflow file still works on my personal fork, but for some reason doesn't on the main project.

.github/workflows/ci.yml

@@ -103,14 +103,6 @@ jobs:
           $vsPath = &"C:\Program Files (x86)\Microsoft Visual Studio\Installer\vswhere.exe" -latest -products * -requires Microsoft.VisualStudio.Component.VC.Tools.x86.x64 -property installationPath
           &"$vsPath\VC\Auxiliary\Build\vcvarsall.bat" x64
         shell: pwsh
-      - name: Cache CMake build directory
-        uses: actions/cache@v4
-        with:
-          path: |
-            build
-          key: ${{ runner.os }}-cmake-build-${{ github.sha }}
-          restore-keys: |
-            ${{ runner.os }}-cmake-build-
       - name: Configure
         run: cmake -B build -DWITH_FFMPEG_JOBS="$env:NUMBER_OF_PROCESSORS"
       - name: Build