Revert "support eth_call for past blocks with old runtimes (#1404)"

This reverts commit e7fccf9.

client/rpc/src/eth/execute.rs

@@ -100,12 +100,7 @@ where
 			let details = fee_details(gas_price, max_fee_per_gas, max_priority_fee_per_gas)?;
 			(
 				details.gas_price,
-				// Old runtimes require max_fee_per_gas to be None for non transactional calls.
-				if details.max_fee_per_gas == Some(U256::zero()) {
-					None
-				} else {
-					details.max_fee_per_gas
-				},
+				details.max_fee_per_gas,
 				details.max_priority_fee_per_gas,
 			)
 		};