Fix one NRE, remove unused code

src/Ryujinx.Graphics.Gpu/Image/Pool.cs

@@ -207,29 +207,6 @@ namespace Ryujinx.Graphics.Gpu.Image
             return false;
         }
 
-        /// <summary>
-        /// Updates the set of entries that have been modified.
-        /// </summary>
-        /// <param name="address">Start address of the region of the pool that has been modfied</param>
-        /// <param name="endAddress">End address of the region of the pool that has been modified, exclusive</param>
-        protected void UpdateModifiedEntries(ulong address, ulong endAddress)
-        {
-            // TODO: Remove this method (it's unused now).
-
-            int startId = (int)((address - Address) / DescriptorSize);
-            int endId = (int)((endAddress - Address + (DescriptorSize - 1)) / DescriptorSize) - 1;
-
-            if (endId < startId)
-            {
-                return;
-            }
-
-            ModifiedEntries.SetRange(startId, endId);
-
-            _minimumAccessedId = Math.Min(_minimumAccessedId, startId);
-            _maximumAccessedId = Math.Max(_maximumAccessedId, endId);
-        }
-
         /// <summary>
         /// Updates a entry that has been modified.
         /// </summary>

src/Ryujinx.Graphics.Gpu/Image/TextureBindingsManager.cs

@@ -929,7 +929,7 @@ namespace Ryujinx.Graphics.Gpu.Image
                     samplerId = TextureHandle.UnpackSamplerId(packedId);
                 }
 
-                if (samplerPool.TryGetBindlessSampler(samplerId, out Sampler sampler))
+                if (samplerPool.TryGetBindlessSampler(samplerId, out Sampler sampler) && sampler != null)
                 {
                     _context.Renderer.Pipeline.RegisterBindlessSampler(samplerId, sampler.GetHostSampler(null));
                 }

src/Ryujinx.Graphics.Vulkan/BindlessManager.cs

@@ -3,7 +3,6 @@ using Ryujinx.Graphics.GAL;
 using Silk.NET.Vulkan;
 using System;
 using System.Collections.Generic;
-using System.ComponentModel.Design;
 using System.Numerics;
 using System.Runtime.InteropServices;