core/vm/runtime: remove another instance of ttdpassed. Isolating this into its own commit as a reminder to double-check that this doesn't break anything

core/vm/runtime/runtime.go

@@ -78,7 +78,6 @@ func setDefaults(cfg *Config) {
 			ArrowGlacierBlock:       nil,
 			GrayGlacierBlock:        nil,
 			TerminalTotalDifficulty: big.NewInt(0),
-			TerminalTotalDifficultyPassed: true,
 			MergeNetsplitBlock:      nil,
 			ShanghaiTime:            &shanghaiTime,
 			CancunTime:              &cancunTime}
@@ -109,10 +108,7 @@ func setDefaults(cfg *Config) {
 	if cfg.BlobBaseFee == nil {
 		cfg.BlobBaseFee = big.NewInt(params.BlobTxMinBlobGasprice)
 	}
-	// Merge indicators
-	if t := cfg.ChainConfig.ShanghaiTime; cfg.ChainConfig.TerminalTotalDifficultyPassed || (t != nil && *t == 0) {
 	cfg.Random = &(common.Hash{})
-	}
 }
 
 // Execute executes the code using the input as call data during the execution.