validation: Move PruneOneBlockFile to BlockManager

[META] This is a pure refactor commit.

Move PruneBlockFile to BlockManager because:
1. PruneOneBlockFile only acts on BlockManager
2. Eliminates the need for callers (FindFilesToPrune{,Manual}) to have a
   reference to the larger ChainstateManager, just a reference to
   BlockManager is enough. See following commits.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/validation.h b/src/validation.h
index 2d9d2cb918..40611fa61f 100644
--- a/src/validation.h
+++ b/src/validation.h
@@ -407,6 +407,9 @@ public:
     /** Create a new block index entry for a given block hash */
     CBlockIndex* InsertBlockIndex(const uint256& hash) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
 
+    //! Mark one block file as pruned (modify associated database entries)
+    void PruneOneBlockFile(const int fileNumber) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
+
     /**
      * If a block header hasn't already been seen, call CheckBlockHeader on it, ensure
      * that it doesn't descend from an invalid block, and then add it to m_block_index.
@@ -903,9 +906,6 @@ public:
      */
     bool ProcessNewBlockHeaders(const std::vector<CBlockHeader>& block, BlockValidationState& state, const CChainParams& chainparams, const CBlockIndex** ppindex = nullptr) LOCKS_EXCLUDED(cs_main);
 
-    //! 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);