Remove mempool global from init

Can be reviewed with the git diff options

--color-moved=dimmed-zebra --color-moved-ws=ignore-all-space --ignore-all-space

src/validation.h

@@ -671,6 +671,9 @@ public:
      */
     void CheckBlockIndex(const Consensus::Params& consensusParams);
 
+    /** Load the persisted mempool from disk */
+    void LoadMempool(const ArgsManager& args);
+
     /** Update the chain tip based on database information, i.e. CoinsTip()'s best block. */
     bool LoadChainTip(const CChainParams& chainparams) EXCLUSIVE_LOCKS_REQUIRED(cs_main);