Remove unused captured state and orphan helpers

internal/usecase/runner_test.go

@@ -2586,10 +2586,6 @@ func float64Ptr(v float64) *float64 {
 	return &v
 }
 
-func stringPtr(v string) *string {
-	return &v
-}
-
 func intPtr(v int) *int {
 	return &v
 }