[DOC][CPU] Denormals optimization doc (#12127)

samples/cpp/benchmark_app/benchmark_app.hpp

@@ -230,8 +230,6 @@ static constexpr char inference_only_message[] =
     " To enable full mode for static models pass \"false\" value to this argument:"
     " ex. \"-inference_only=false\".\n";
 
-static const char denormals_optimization_message[] = "Optional. Denormals is optimized by treating as zero";
-
 /// @brief Define flag for showing help message <br>
 DEFINE_bool(h, false, help_message);
 
@@ -365,9 +363,6 @@ DEFINE_string(imean, "", input_image_mean_message);
 /// @brief Define flag for inference only mode <br>
 DEFINE_bool(inference_only, true, inference_only_message);
 
-/// @brief Define flag for denormals handling mode <br>
-DEFINE_bool(dopt, false, denormals_optimization_message);
-
 /**
  * @brief This function show a help message
  */
@@ -421,5 +416,4 @@ static void show_usage() {
     std::cout << "    -iscale                   " << input_image_scale_message << std::endl;
     std::cout << "    -imean                    " << input_image_mean_message << std::endl;
     std::cout << "    -inference_only           " << inference_only_message << std::endl;
-    std::cout << "    -dopt                     " << denormals_optimization_message << std::endl;
 }