fix(deps): drop unused @react-spring/web from root deps

@react-spring/web@^10.0.3 was accidentally introduced via our squash
commit but nothing in the source tree imports from @react-spring/* .
The version conflicted with @visx/xychart's peer dependency on
@react-spring/web@^9.4.5, causing docker compose up to fail with
ERESOLVE in the superset-node frontend container (which runs plain
`npm install`, no --legacy-peer-deps).

Removing the dead dep eliminates the conflict — Docker's npm install
now resolves cleanly without needing --legacy-peer-deps.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>