[clang][Interp][NFC] Use delegate() vor ParenExprs

Now what we have delegate() we can use it here.

Author: tbaederr

clang/lib/AST/Interp/ByteCodeExprGen.cpp

@@ -222,13 +222,8 @@ bool ByteCodeExprGen<Emitter>::VisitFloatingLiteral(const FloatingLiteral *E) {
 }
 
 template <class Emitter>
-bool ByteCodeExprGen<Emitter>::VisitParenExpr(const ParenExpr *PE) {
-  const Expr *SubExpr = PE->getSubExpr();
-
-  if (DiscardResult)
-    return this->discard(SubExpr);
-
-  return this->visit(SubExpr);
+bool ByteCodeExprGen<Emitter>::VisitParenExpr(const ParenExpr *E) {
+  return this->delegate(E->getSubExpr());
 }
 
 template <class Emitter>