Small code cleanup. Non-functional change.

src/Generator/Generators/CSharp/CSharpGenerator.cs

@@ -33,7 +33,7 @@ namespace CppSharp.Generators.CSharp
             // CheckAbiParameters runs last because hidden structure parameters
             // should always occur first.
 
-            Driver.AddTranslationUnitPass(new CheckAbiParameters(Driver.Options));
+            Driver.AddTranslationUnitPass(new CheckAbiParameters());
 
             return true;
         }

src/Generator/Passes/CheckAbiParameters.cs

@@ -20,13 +20,6 @@ namespace CppSharp.Passes
     /// </summary>
     public class CheckAbiParameters : TranslationUnitPass
     {
-        private readonly DriverOptions options;
-
-        public CheckAbiParameters(DriverOptions options)
-        {
-            this.options = options;
-        }
-
         public override bool VisitFunctionDecl(Function function)
         {
             if (!VisitDeclaration(function))
@@ -49,7 +42,7 @@ namespace CppSharp.Passes
             if (function.HasThisReturn)
             {
                 // This flag should only be true on methods.
-                var method = (Method)function;
+                var method = (Method) function;
                 var classType = new QualifiedType(new TagType(method.Namespace),
                     new TypeQualifiers {IsConst = true});
                 function.ReturnType = new QualifiedType(new PointerType(classType));