Remove unnecessary reliance on eth68 mock peers in FullSyncChainDownloaderForkTest

Signed-off-by: Matilda Clerke <[email protected]>

Author: Matilda-Clerke

ethereum/eth/src/test/java/org/hyperledger/besu/ethereum/eth/sync/fullsync/FullSyncChainDownloaderForkTest.java

@@ -21,7 +21,6 @@
 import org.hyperledger.besu.ethereum.chain.Blockchain;
 import org.hyperledger.besu.ethereum.chain.MutableBlockchain;
 import org.hyperledger.besu.ethereum.core.BlockchainSetupUtil;
-import org.hyperledger.besu.ethereum.core.Difficulty;
 import org.hyperledger.besu.ethereum.eth.EthProtocolConfiguration;
 import org.hyperledger.besu.ethereum.eth.manager.EthContext;
 import org.hyperledger.besu.ethereum.eth.manager.EthProtocolManager;
@@ -111,12 +110,10 @@ private SynchronizerConfiguration.Builder syncConfigBuilder() {
   @Test
   public void disconnectsFromPeerOnBadFork() {
     otherBlockchainSetup.importAllBlocks();
-    final Difficulty localTd = localBlockchain.getChainHead().getTotalDifficulty();
 
     final RespondingEthPeer.Responder responder =
         RespondingEthPeer.blockchainResponder(otherBlockchain);
-    final RespondingEthPeer peer =
-        EthProtocolManagerTestUtil.createPeer(ethProtocolManager, localTd.add(100), 100);
+    final RespondingEthPeer peer = EthProtocolManagerTestUtil.createPeer(ethProtocolManager, 100);
 
     final ChainDownloader downloader = downloader();
     downloader.start();