Redundant `if` flagged by hlint

```haskell
-- src/EVM.hs:(2490,7)-(2498,65): Warning: Redundant if
-- Found:
if offs64 + sz64 < sz64 then
vmError IllegalOverflow
else
if offs64 >= 0x0fffffff || sz64 >= 0x0fffffff then
vmError IllegalOverflow
else
accessUnboundedMemoryRange offs64 sz64 continue
-- Perhaps:
(if (offs64 + sz64 < sz64)
|| (offs64 >= 0x0fffffff || sz64 >= 0x0fffffff) then
vmError IllegalOverflow
else
accessUnboundedMemoryRange offs64 sz64 continue)
```

Open src/EVM.hs at the reported range around lines 2490–2498 and inspect the redundant if warning from hlint. Simplify the nested conditional as suggested, then run hlint or the project’s Haskell checks to confirm the warning is gone and existing behavior remains unchanged.

Written by the indexing model from the issue text.