vulkan: Remove CreateCommandBufferPool from VulkanInitialization (#4606)

It was only called in one place, that can be simplified.

Ryujinx.Graphics.Vulkan/VulkanInitialization.cs

@@ -672,11 +672,6 @@ namespace Ryujinx.Graphics.Vulkan
             return extensionProperties.Select(x => Marshal.PtrToStringAnsi((IntPtr)x.ExtensionName)).ToArray();
         }
 
-        internal static CommandBufferPool CreateCommandBufferPool(Vk api, Device device, Queue queue, object queueLock, uint queueFamilyIndex)
-        {
-            return new CommandBufferPool(api, device, queue, queueLock, queueFamilyIndex);
-        }
-
         internal unsafe static void CreateDebugMessenger(
             Vk api,
             GraphicsDebugLevel logLevel,

Ryujinx.Graphics.Vulkan/VulkanRenderer.cs

@@ -168,7 +168,9 @@ namespace Ryujinx.Graphics.Vulkan
                 SType = StructureType.PhysicalDeviceSubgroupSizeControlPropertiesExt
             };
 
-            if (Capabilities.SupportsSubgroupSizeControl)
+            bool supportsSubgroupSizeControl = supportedExtensions.Contains("VK_EXT_subgroup_size_control");
+
+            if (supportsSubgroupSizeControl)
             {
                 properties2.PNext = &propertiesSubgroupSizeControl;
             }
@@ -292,7 +294,7 @@ namespace Ryujinx.Graphics.Vulkan
                 supportedExtensions.Contains(KhrDrawIndirectCount.ExtensionName),
                 supportedExtensions.Contains("VK_EXT_fragment_shader_interlock"),
                 supportedExtensions.Contains("VK_NV_geometry_shader_passthrough"),
-                supportedExtensions.Contains("VK_EXT_subgroup_size_control"),
+                supportsSubgroupSizeControl,
                 featuresShaderInt8.ShaderInt8,
                 supportedExtensions.Contains("VK_EXT_shader_stencil_export"),
                 supportedExtensions.Contains(ExtConditionalRendering.ExtensionName),
@@ -318,7 +320,7 @@ namespace Ryujinx.Graphics.Vulkan
 
             MemoryAllocator = new MemoryAllocator(Api, _physicalDevice, _device, properties.Limits.MaxMemoryAllocationCount);
 
-            CommandBufferPool = VulkanInitialization.CreateCommandBufferPool(Api, _device, Queue, QueueLock, queueFamilyIndex);
+            CommandBufferPool = new CommandBufferPool(Api, _device, Queue, QueueLock, queueFamilyIndex);
 
             DescriptorSetManager = new DescriptorSetManager(_device);