fix a compile error

Author: JiayiFeng

paddle/fluid/inference/tensorrt/convert/ut_helper.h

@@ -101,7 +101,7 @@ class TRTConvertValidation {
     engine_->FreezeNetwork();
 
     // Declare outputs.
-    op_desc_.reset(new framework::OpDesc(desc, nullptr, nullptr));
+    op_desc_.reset(new framework::OpDesc(desc, nullptr));
 
     // Set Inputs.
     for (const auto& input : op_desc_->InputArgumentNames()) {