message: validation: Make PruneOneBlockFile() a member of ChainstateManager
diff: @@ -834,6 +834,9 @@ public:
  CChain& ValidatedChain() const { return ValidatedChainstate().m_chain; }
  CBlockIndex* ValidatedTip() const { return ValidatedChain().Tip(); }
  + //! Mark one block file as pruned (modify associated database entries)
  + void PruneOneBlockFile(const int fileNumber) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
  +
  //! Load the block tree and coins database from disk, initializing state if we're running with -reindex
  bool LoadBlockIndex(const CChainParams& chainparams) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
  