chore: converted BufferHandle ToInt32 extension to an implicit int operator on BufferHandle directly.

src/Ryujinx.Graphics.OpenGL/Handle.cs

@@ -1,4 +1,3 @@
-using Ryujinx.Graphics.GAL;
 using System.Diagnostics;
 using System.Runtime.CompilerServices;
 
@@ -14,10 +13,5 @@ namespace Ryujinx.Graphics.OpenGL
 
             return Unsafe.As<ulong, T>(ref handle64);
         }
-
-        public static int ToInt32(this BufferHandle handle)
-        {
-            return (int)Unsafe.As<BufferHandle, ulong>(ref handle);
-        }
     }
 }