remove duplicate call (#594)

Author: zhiqiangxu

core/genesis.go

@@ -490,11 +490,6 @@ func SetupGenesisBlockWithOverride(db ethdb.Database, triedb *triedb.Database, g
 		return nil, common.Hash{}, nil, err
 	}
 
-	// Sanity-check the new configuration.
-	if err := newCfg.CheckConfigForkOrder(); err != nil {
-		return nil, common.Hash{}, nil, err
-	}
-
 	// OP-Stack note: Always apply overrides.
 	// The genesis function arg may be nil, and stored-config may be non-nil at the same time.
 	// This is important to apply superchain-upgrades to existing DBs, where the network CLI flag is not used.