Structural and Memory Safety Improvements, Analyzer Cleanup (ryubing/ryujinx!47)

See merge request ryubing/ryujinx!47

src/Ryujinx.Graphics.Shader/Instructions/InstEmitBarrier.cs

@@ -22,9 +22,7 @@ namespace Ryujinx.Graphics.Shader.Instructions
 
         public static void Depbar(EmitterContext context)
         {
-#pragma warning disable IDE0059 // Remove unnecessary value assignment
-            InstDepbar op = context.GetOp<InstDepbar>();
-#pragma warning restore IDE0059
+            _ = context.GetOp<InstDepbar>();
 
             // No operation.
         }