[clang][Interp][NFC] Use delegate() once more

Author: tbaederr

clang/lib/AST/Interp/ByteCodeExprGen.cpp

@@ -2394,9 +2394,7 @@ bool ByteCodeExprGen<Emitter>::VisitUnaryOperator(const UnaryOperator *E) {
   case UO_Real:   // __real x
   case UO_Imag:   // __imag x
   case UO_Extension:
-    if (DiscardResult)
-      return this->discard(SubExpr);
-    return this->visit(SubExpr);
+    return this->delegate(SubExpr);
   case UO_Coawait:
     assert(false && "Unhandled opcode");
   }