Case T-743/16 RENV II: Judgment of the General Court of 24 November 2021 — CX v Commission (Civil service — Officials — Disciplinary measure — Removal from post — OLAF investigation — Unauthorised and clandestine negotiation of a contract — Conflict of interests — Certification of a non-compliant invoice — Rights of the defence — Right to be heard — Repeated absence of the applicant and his lawyer from the disciplinary hearing — Legal certainty — Legitimate expectations — Proportionality — Reasonable time — Principle ne bis in idem — Manifest error of assessment — Obligation to state reasons)