EIP-3529: Remove the SELFDESTRUCT refund.

- remove it from both nim-evm and nim-evm2

nimbus/vm/state_transactions.nim

@@ -8,7 +8,7 @@
 import
   options, sets,
   eth/common, chronicles, ../db/accounts_cache,
-  ../transaction,
+  ../transaction, ../forks,
   ./computation, ./interpreter, ./state, ./types
 
 proc execComputation*(c: Computation) =
@@ -19,6 +19,8 @@ proc execComputation*(c: Computation) =
   c.execCallOrCreate()
 
   if c.isSuccess:
+    if c.fork < FkLondon:
+      # EIP-3529: Reduction in refunds
       c.refundSelfDestruct()
     shallowCopy(c.vmState.selfDestructs, c.selfDestructs)
     shallowCopy(c.vmState.logEntries, c.logEntries)

nimbus/vm2/state_transactions.nim

@@ -89,6 +89,8 @@ proc execComputation*(c: Computation) =
   c.execCallOrCreate()
 
   if c.isSuccess:
+    if c.fork < FkLondon:
+      # EIP-3529: Reduction in refunds
       c.refundSelfDestruct()
     shallowCopy(c.vmState.selfDestructs, c.selfDestructs)
     shallowCopy(c.vmState.logEntries, c.logEntries)