chore: satisfy review-fix formatting and unused-code checks

Signed-off-by: Feng Ruohang <rh@vonng.com>

cmd/erasure-server-pool-lifecycle-authority_test.go

@@ -634,7 +634,6 @@ func TestPoolsLifecycleMissingVersion(t *testing.T) {
 // The completeness checks also hold where a set has fewer answering drives
 // than a read quorum or no version reaches one.
 func TestPoolsLifecycleHistoryEarlyReturns(t *testing.T) {
-
 	// Seven drives hold the key, the other nine do not have it at all.
 	t.Run("minority-copy-only", func(t *testing.T) {
 		s := newSplitILM(t, versioning.Enabled, splitILMRules)
@@ -1245,14 +1244,6 @@ func TestPoolsLifecycleNullGenerations(t *testing.T) {
 	}
 }
 
-// authoritySideEffects collects the version IDs that removal notifications
-// and ILM expiry audit traces report.
-func authoritySideEffects(t *testing.T, run func()) (notified, traced []string) {
-	t.Helper()
-	notified, traced, _ = authoritySideEffectsAll(t, run)
-	return notified, traced
-}
-
 // authoritySideEffectsAll also returns, by version ID, the result an ILM
 // trace reports for an expiry that did not remove its version: "refused" or
 // "failed". Such traces are not removal traces.