Updated codegen for class decl

crates/parser/src/ast/top_level.rs

@@ -126,18 +126,3 @@ pub struct FieldDeclStmt {
     pub decl: FieldDecl,
     pub init: Option<Expression>,
 }
-
-impl FunctionDecl {
-    pub fn is_using_self(&self) -> bool {
-        match self.params.0.get(0) {
-            Some(VarDecl { name, .. }) => {
-                if let Pattern::Path(_, v) = name {
-                    v.0.len() == 1 && v.0[0].0 == "self"
-                } else {
-                    false
-                }
-            }
-            _ => false,
-        }
-    }
-}