remove system mode and request memoization

Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>

crates/llvm-context/src/polkavm/context/yul_data.rs

@@ -8,28 +8,12 @@ use num::Zero;
 /// Describes some data that is only relevant to Yul.
 #[derive(Debug, Default)]
 pub struct YulData {
-    /// The system mode flag.
-    /// The call simulations only work if this mode is enabled.
-    is_system_mode: bool,
     /// The list of constant arrays in the code section.
     /// It is a temporary storage used until the finalization method is called.
     const_arrays: BTreeMap<u8, Vec<num::BigUint>>,
 }
 
 impl YulData {
-    /// A shortcut constructor.
-    pub fn new(is_system_mode: bool) -> Self {
-        Self {
-            is_system_mode,
-            const_arrays: BTreeMap::new(),
-        }
-    }
-
-    /// Whether the system mode is enabled.
-    pub fn is_system_mode(&self) -> bool {
-        self.is_system_mode
-    }
-
     /// Declares a temporary constant array representation.
     pub fn const_array_declare(&mut self, index: u8, size: u16) -> anyhow::Result<()> {
         if self.const_arrays.contains_key(&index) {