Revert "feat(turbopack): Add an env var to debug-print the fast refresh invalidation reason (#72296)" (#72421)
Not sure why this is happening, but @kdy1 bisected this commit to a null pointer assertion error in napi: https://vercel.slack.com/archives/C03EWR7LGEN/p1730901839682439?thread_ts=1730899709.760659&cid=C03EWR7LGEN
Reverting until I can repro and root cause.
Closes PACK-3402