Do you identify any unlearning process in the case "Harley-Davidson: Strategic Competitiveness that Span Decades"? Please describe in detail based on the theories of the course [Porter's five forces, Mintzberg's Critique of Formal Strategic Planning, Path dependency, Hierarchical VS flat organizations, causation (goal-driven) and effectuation (resource-driven) logics, Kotter's 8 steps for strategic change, Unlearning procedure for strategic change]