Remove declaration of no longer existent CheckWork

Also make ProcessBlockFound static as it is not used outside
miner.cpp.

Alternative implementation of #5549.

src/miner.cpp

@@ -411,7 +411,7 @@ CBlockTemplate* CreateNewBlockWithKey(CReserveKey& reservekey)
     return CreateNewBlock(scriptPubKey);
 }
 
-bool ProcessBlockFound(CBlock* pblock, CWallet& wallet, CReserveKey& reservekey)
+static bool ProcessBlockFound(CBlock* pblock, CWallet& wallet, CReserveKey& reservekey)
 {
     LogPrintf("%s\n", pblock->ToString());
     LogPrintf("generated %s\n", FormatMoney(pblock->vtx[0].vout[0].nValue));

src/miner.h

@@ -24,8 +24,6 @@ CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn);
 CBlockTemplate* CreateNewBlockWithKey(CReserveKey& reservekey);
 /** Modify the extranonce in a block */
 void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int& nExtraNonce);
-/** Check mined block */
-bool CheckWork(CBlock* pblock, CWallet& wallet, CReserveKey& reservekey);
 void UpdateTime(CBlockHeader* block, const CBlockIndex* pindexPrev);
 
 extern double dHashesPerSec;