Simplify rollup config file by removing unused imports (#7288)

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: jonrohan <[email protected]>
Co-authored-by: Jon Rohan <[email protected]>
Co-authored-by: primer[bot] <119360173+primer[bot]@users.noreply.github.com>

Author: 3 people