CI: fix windows CI (#37321)

GitHub-hosted runners do not check out to D: drive, apparently.

Testing: Manual CI run:
https://github.com/sagudev/servo/actions/runs/15506836392/job/43662762580
Fixes: #37311

Signed-off-by: sagudev <16504129+sagudev@users.noreply.github.com>

.github/workflows/windows.yml

@@ -167,10 +167,6 @@ jobs:
         run: |
           .\mach build --use-crown --locked --${{ inputs.profile }} ${{ inputs.build-args }}
           cp C:\a\servo\servo\target\cargo-timings C:\a\servo\servo\target\cargo-timings-windows -Recurse
-      - name: Copy resources
-        if: ${{ runner.environment != 'self-hosted' }}
-        # GitHub-hosted runners check out the repo on D: drive.
-        run: cp D:\a\servo\servo\resources C:\a\servo\servo -Recurse
       - name: Smoketest
         run: .\mach smoketest --${{ inputs.profile }}
       - name: Unit tests