C#: Remove dependency to ASP.NET in the System.Web.cs stub file.

Author: michaelnebel

csharp/ql/test/query-tests/Security Features/CWE-611/options

@@ -1,4 +1,2 @@
-semmle-extractor-options: /nostdlib /noconfig
-semmle-extractor-options: --load-sources-from-project:${testdir}/../../../resources/stubs/_frameworks/Microsoft.NETCore.App/Microsoft.NETCore.App.csproj
-semmle-extractor-options: --load-sources-from-project:${testdir}/../../../resources/stubs/_frameworks/Microsoft.AspNetCore.App/Microsoft.AspNetCore.App.csproj
-semmle-extractor-options: ${testdir}/../../../resources/stubs/System.Web.cs
+semmle-extractor-options: ${testdir}/../../../resources/stubs/System.Web.cs
+semmle-extractor-options: /r:System.Collections.Specialized.dll /r:System.Xml.ReaderWriter.dll /r:System.Private.Xml.dll /r:System.Runtime.Extensions.dll

csharp/ql/test/resources/stubs/System.Web.Http.cs

@@ -0,0 +1,14 @@
+namespace System.Web.Http
+{
+    public class ApiController
+    {
+        public Microsoft.AspNetCore.Http.HttpContext Context => null;
+        public virtual Microsoft.AspNetCore.Mvc.RedirectResult Redirect(Uri location) => null;
+        public virtual Microsoft.AspNetCore.Mvc.RedirectResult Redirect(string location) => null;
+        public virtual ResponseMessageResult ResponseMessage(System.Net.Http.HttpResponseMessage response) => null;
+        public virtual Microsoft.AspNetCore.Mvc.RedirectToRouteResult RedirectToRoute(string routeName, object routeValues) => null;
+        public Microsoft.AspNetCore.Mvc.IUrlHelper Url { get; set; }
+    }
+
+    public class ResponseMessageResult { }
+}

csharp/ql/test/resources/stubs/System.Web.cs

@@ -60,21 +60,6 @@ public class HttpApplication : IHttpHandler
     }
 }
 
-namespace System.Web.Http
-{
-    public class ApiController
-    {
-        public Microsoft.AspNetCore.Http.HttpContext Context => null;
-        public virtual Microsoft.AspNetCore.Mvc.RedirectResult Redirect(Uri location) => null;
-        public virtual Microsoft.AspNetCore.Mvc.RedirectResult Redirect(string location) => null;
-        public virtual ResponseMessageResult ResponseMessage(System.Net.Http.HttpResponseMessage response) => null;
-        public virtual Microsoft.AspNetCore.Mvc.RedirectToRouteResult RedirectToRoute(string routeName, object routeValues) => null;
-        public Microsoft.AspNetCore.Mvc.IUrlHelper Url { get; set; }
-    }
-
-    public class ResponseMessageResult { }
-}
-
 namespace System.Web.Mvc
 {
     public class Controller