Remove legacy mined block cpfp loop, reset stale ancestors

backend/src/api/blocks.ts

@@ -127,14 +127,6 @@ class Blocks {
       }
     }
 
-    if (addMempoolData) {
-      transactions.forEach((tx) => {
-        if (!tx.cpfpChecked) {
-          Common.setRelativesAndGetCpfpInfo(tx as MempoolTransactionExtended, mempool); // Child Pay For Parent
-        }
-      });
-    }
-
     if (!quiet) {
       logger.debug(`${transactionsFound} of ${txIds.length} found in mempool. ${transactionsFetched} fetched through backend service.`);
     }

backend/src/api/mempool-blocks.ts

@@ -358,6 +358,9 @@ class MempoolBlocks {
             block: blockIndex,
             vsize: totalVsize + (mempoolTx.vsize / 2),
           };
+          mempoolTx.ancestors = [];
+          mempoolTx.descendants = [];
+          mempoolTx.bestDescendant = null;
           mempoolTx.cpfpChecked = true;
 
           // online calculation of stack-of-blocks fee stats