Don't need to store download cache of vcpkg

vcpkg can detect their cache from `vcpkg/installed`.

Author: hsbt

.github/workflows/windows.yml

@@ -93,14 +93,6 @@ jobs:
             ${{ steps.find-tools.outputs.needs }}
         if: ${{ steps.find-tools.outputs.needs != '' }}
 
-      - uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.2.3
-        with:
-          path: C:\vcpkg\downloads
-          key: ${{ runner.os }}-vcpkg-download-${{ env.OS_VER }}-${{ github.sha }}
-          restore-keys: |
-            ${{ runner.os }}-vcpkg-download-${{ env.OS_VER }}-
-            ${{ runner.os }}-vcpkg-download-
-
       - uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.2.3
         with:
           path: C:\vcpkg\installed