transpile: Do not unwrap Paren with CExprId index

Author: Rua

c2rust-transpile/src/c_ast/mod.rs

@@ -1519,21 +1519,15 @@ impl Index<CTypeId> for TypedAstContext {
 
 impl Index<CExprId> for TypedAstContext {
     type Output = CExpr;
+
     fn index(&self, index: CExprId) -> &CExpr {
         static BADEXPR: CExpr = Located {
             loc: None,
             kind: CExprKind::BadExpr,
         };
         match self.c_exprs.get(&index) {
             None => &BADEXPR, // panic!("Could not find {:?} in TypedAstContext", index),
-            Some(e) => {
-                // Transparently index through Paren expressions
-                if let CExprKind::Paren(_, subexpr) = e.kind {
-                    self.index(subexpr)
-                } else {
-                    e
-                }
-            }
+            Some(e) => e,
         }
     }
 }