[mining] Remove -blockprioritysize.

Remove ability of mining code to fill part of a block with transactions sorted by coin age.

src/miner.h

@@ -158,10 +158,6 @@ private:
     int64_t nLockTimeCutoff;
     const CChainParams& chainparams;
 
-    // Variables used for addPriorityTxs
-    int lastFewTxs;
-    bool blockFinished;
-
 public:
     BlockAssembler(const CChainParams& chainparams);
     /** Construct a new block template with coinbase to scriptPubKeyIn */
@@ -175,17 +171,9 @@ private:
     void AddToBlock(CTxMemPool::txiter iter);
 
     // Methods for how to add transactions to a block.
-    /** Add transactions based on tx "priority" */
-    void addPriorityTxs();
     /** Add transactions based on feerate including unconfirmed ancestors */
     void addPackageTxs();
 
-    // helper function for addPriorityTxs
-    /** Test if tx will still "fit" in the block */
-    bool TestForBlock(CTxMemPool::txiter iter);
-    /** Test if tx still has unconfirmed parents not yet in block */
-    bool isStillDependent(CTxMemPool::txiter iter);
-
     // helper functions for addPackageTxs()
     /** Remove confirmed (inBlock) entries from given set */
     void onlyUnconfirmed(CTxMemPool::setEntries& testSet);