simplify op_info.h, test=develop (#20195)

paddle/fluid/framework/op_info.h

@@ -79,13 +79,9 @@ struct OpInfo {
   }
 
   // some op has no grad_op_maker, add check before use GradOpMaker()
-  bool HasGradOpMaker() const {
-    return grad_op_maker_ != nullptr ? true : false;
-  }
+  bool HasGradOpMaker() const { return grad_op_maker_ != nullptr; }
 
-  bool HasInferInplace() const {
-    return infer_inplace_ != nullptr ? true : false;
-  }
+  bool HasInferInplace() const { return infer_inplace_ != nullptr; }
 
   const OpAttrChecker* Checker() const { return checker_; }