Improve synchronization based on vulkan-tutorial

https://vulkan-tutorial.com/Drawing_a_triangle/Drawing/Rendering_and_presentation

src/Nazara/VulkanRenderer/VkRenderTarget.cpp

@@ -15,6 +15,5 @@ namespace Nz
 	void VkRenderTarget::Destroy()
 	{
 		m_renderPass.Destroy();
-		m_imageReadySemaphore.Destroy();
 	}
 }