Clean up error handling for JS_ToBool.

Author: tritao

src/Generator/Generators/QuickJS/QuickJSMarshal.cs

@@ -509,8 +509,6 @@ public bool VisitPrimitiveType(PrimitiveType primitive)
 
                 case PrimitiveType.Bool:
                     Context.Before.WriteLine($"{argName} = JS_ToBool(ctx, argv[{Context.ParameterIndex}]);");
-                    Context.Before.WriteLine($"if ({argName} == -1)");
-                    Context.Before.WriteLineIndent("return JS_EXCEPTION;");
                     Context.Return.Write($"{argName}");
                     return true;