Revert "core/txpool/legacypool: reheap the tx list if london fork not…

… enabled (ethereum#27481)"

This reverts commit 0a44648.

core/txpool/legacypool/legacypool.go

@@ -1206,13 +1206,9 @@ func (pool *LegacyPool) runReorg(done chan struct{}, reset *txpoolResetRequest,
 	// because of another transaction (e.g. higher gas price).
 	if reset != nil {
 		pool.demoteUnexecutables()
-		if reset.newHead != nil {
-			if pool.chainconfig.IsLondon(new(big.Int).Add(reset.newHead.Number, big.NewInt(1))) {
-				pendingBaseFee := misc.CalcBaseFee(pool.chainconfig, reset.newHead)
-				pool.priced.SetBaseFee(pendingBaseFee)
-			} else {
-				pool.priced.Reheap()
-			}
+		if reset.newHead != nil && pool.chainconfig.IsLondon(new(big.Int).Add(reset.newHead.Number, big.NewInt(1))) {
+			pendingBaseFee := misc.CalcBaseFee(pool.chainconfig, reset.newHead)
+			pool.priced.SetBaseFee(pendingBaseFee)
 		}
 		// Update all accounts to the latest known pending nonce
 		nonces := make(map[common.Address]uint64, len(pool.pending))