Sample app: remove outdated comment

https://github.com/KhronosGroup/Vulkan-ValidationLayers/issues/579 is now fixed so RenderDoc works with the sample app also when it uses VK_KHR_dedicated_allocation when latest Vulkan SDK is used.
diff --git a/src/VulkanSample.cpp b/src/VulkanSample.cpp
index 55ce032..bd4a422 100644
--- a/src/VulkanSample.cpp
+++ b/src/VulkanSample.cpp
@@ -1352,17 +1352,6 @@
 

     if(VK_KHR_dedicated_allocation_enabled)

     {

-        /*

-        Comment out this line to make the app working with RenderDoc.

-    

-        Currently there is a problem with compatibility of this app with RenderDoc due

-        to a known bug in Vulkan validation layers:

-

-        https://github.com/KhronosGroup/Vulkan-ValidationLayers/issues/579

-

-        It occurs because this app uses Vulkan 1.0 and VK_KHR_dedicated_allocation

-        extension instead of equivalent functionality embedded into Vulkan 1.1.

-        */

         allocatorInfo.flags |= VMA_ALLOCATOR_CREATE_KHR_DEDICATED_ALLOCATION_BIT;

     }

     if(VK_KHR_bind_memory2_enabled)