chore: drop a node_modules symlink from the tree

apps/pwa/node_modules was a symlink into another worktree, created so the
previous commit's tests could resolve @libsql/client. It is machine-local and
points at a path that exists nowhere else.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: ralyodio