Update getRecipeName documentation

Author: Razvan Lupusoru

mlir/include/mlir/Dialect/OpenACC/OpenACCUtils.h

@@ -43,12 +43,8 @@ mlir::acc::VariableTypeCategory getTypeCategory(mlir::Value var);
 /// empty string if no name is found.
 std::string getVariableName(mlir::Value v);
 
-/// Get the recipe name for a given kind, type and value.
-///
-/// \param kind The kind of recipe to get the name for.
-/// \param type The type to get the recipe name for. Can be null if the
-///        var is provided instead.
-/// \return The recipe name, or an empty string if not available.
+/// Get the recipe name for a given recipe kind and type.
+/// Returns an empty string if not possible to generate a recipe name.
 std::string getRecipeName(mlir::acc::RecipeKind kind, mlir::Type type);
 
 } // namespace acc