Remove stub mirror driver code

We don't have any meaningful code for the mirror driver, so
remove the confusing stub and interface for it.
diff --git a/win/rfb_win32/SDisplay.cxx b/win/rfb_win32/SDisplay.cxx
index 26a7bbc..d4cedf8 100644
--- a/win/rfb_win32/SDisplay.cxx
+++ b/win/rfb_win32/SDisplay.cxx
@@ -29,7 +29,6 @@
 #include <rfb_win32/MonitorInfo.h>
 #include <rfb_win32/SDisplayCorePolling.h>
 #include <rfb_win32/SDisplayCoreWMHooks.h>
-#include <rfb_win32/SDisplayCoreDriver.h>
 #include <rfb/Exception.h>
 #include <rfb/LogWriter.h>
 
@@ -173,9 +172,7 @@
   int tryMethod = updateMethod_;
   while (!core) {
     try {
-      if (tryMethod == 2)
-        core = new SDisplayCoreDriver(this, &updates);
-      else if (tryMethod == 1)
+      if (tryMethod == 1)
         core = new SDisplayCoreWMHooks(this, &updates);
       else
         core = new SDisplayCorePolling(this, &updates);
@@ -234,10 +231,6 @@
   return WMHooks::areAvailable();
 }
 
-bool SDisplay::isDriverAvailable() {
-  return SDisplayCoreDriver::isAvailable();
-}
-
 
 bool SDisplay::isRestartRequired() {
   // - We must restart the SDesktop if:
diff --git a/win/rfb_win32/SDisplay.h b/win/rfb_win32/SDisplay.h
index 6aac59a..70208a7 100644
--- a/win/rfb_win32/SDisplay.h
+++ b/win/rfb_win32/SDisplay.h
@@ -96,9 +96,8 @@
       static BoolParameter removePattern;
       static BoolParameter disableEffects;
 
-      // -=- Use by VNC Config to determine whether hooks, driver, etc are available
+      // -=- Use by VNC Config to determine whether hooks are available
       static bool areHooksAvailable();
-      static bool isDriverAvailable();
 
 
     protected:
diff --git a/win/rfb_win32/SDisplayCoreDriver.h b/win/rfb_win32/SDisplayCoreDriver.h
deleted file mode 100644
index 5fea75c..0000000
--- a/win/rfb_win32/SDisplayCoreDriver.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
- * 
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- * 
- * This software is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this software; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
- * USA.
- */
-
-// -=- SDisplayCoreDriver.h
-//
-// Placeholder for SDisplayCore mirror-driver implementation.
-
-#ifndef __RFB_SDISPLAY_CORE_DRIVER_H__
-#define __RFB_SDISPLAY_CORE_DRIVER_H__
-
-#include <rfb_win32/SDisplay.h>
-
-namespace rfb {
-  namespace win32 {
-
-    class SDisplayCoreDriver: public SDisplayCore {
-    public:
-      SDisplayCoreDriver(SDisplay* display, UpdateTracker* ut) {
-        throw rdr::Exception("Not supported");
-      }
-
-      // - Called by SDisplay to inform Core of the screen size
-      virtual void setScreenRect(const Rect& screenRect_) {}
-
-      // - Called by SDisplay to flush updates to the specified tracker
-      virtual void flushUpdates() {}
-
-      virtual const char* methodName() const { return "VNC Mirror Driver"; }
-
-      // - Determine whether the display driver is installed & usable
-      static bool isAvailable() { return false; }
-    };
-
-  };
-};
-
-#endif
diff --git a/win/vncconfig/Hooking.h b/win/vncconfig/Hooking.h
index 9be82f3..b8137dd 100644
--- a/win/vncconfig/Hooking.h
+++ b/win/vncconfig/Hooking.h
@@ -37,9 +37,6 @@
         setItemChecked(IDC_USEHOOKS, (rfb::win32::SDisplay::updateMethod == 1) &&
                        rfb::win32::SDisplay::areHooksAvailable());
         enableItem(IDC_USEHOOKS, rfb::win32::SDisplay::areHooksAvailable());
-        setItemChecked(IDC_USEDRIVER, (rfb::win32::SDisplay::updateMethod == 2) &&
-                       rfb::win32::SDisplay::isDriverAvailable());
-        enableItem(IDC_USEDRIVER, rfb::win32::SDisplay::isDriverAvailable());
         setItemChecked(IDC_POLLCONSOLES, rfb::win32::WMPoller::poll_console_windows);
         setItemChecked(IDC_CAPTUREBLT, osVersion.isPlatformNT &&
                        rfb::win32::DeviceFrameBuffer::useCaptureBlt);
@@ -50,12 +47,10 @@
         switch (id) {
         case IDC_USEPOLLING:
         case IDC_USEHOOKS:
-        case IDC_USEDRIVER:
         case IDC_POLLCONSOLES:
         case IDC_CAPTUREBLT:
           setChanged(((rfb::win32::SDisplay::updateMethod == 0) != isItemChecked(IDC_USEPOLLING)) ||
             ((rfb::win32::SDisplay::updateMethod == 1) != isItemChecked(IDC_USEHOOKS)) ||
-            ((rfb::win32::SDisplay::updateMethod == 2) != isItemChecked(IDC_USEDRIVER)) ||
             (rfb::win32::WMPoller::poll_console_windows != isItemChecked(IDC_POLLCONSOLES)) ||
             (rfb::win32::DeviceFrameBuffer::useCaptureBlt != isItemChecked(IDC_CAPTUREBLT)));
           enableItem(IDC_POLLCONSOLES, isItemChecked(IDC_USEHOOKS));
@@ -68,8 +63,6 @@
           regKey.setInt(_T("UpdateMethod"), 0);
         if (isItemChecked(IDC_USEHOOKS))
           regKey.setInt(_T("UpdateMethod"), 1);
-        if (isItemChecked(IDC_USEDRIVER))
-          regKey.setInt(_T("UpdateMethod"), 2);
         regKey.setBool(_T("PollConsoleWindows"), isItemChecked(IDC_POLLCONSOLES));
         regKey.setBool(_T("UseCaptureBlt"), isItemChecked(IDC_CAPTUREBLT));
 
diff --git a/win/vncconfig/resource.h b/win/vncconfig/resource.h
index 395edc9..7b8e647 100644
--- a/win/vncconfig/resource.h
+++ b/win/vncconfig/resource.h
@@ -69,7 +69,6 @@
 #define IDC_CAPTUREBLT                  1062
 #define IDC_QUERY                       1064
 #define IDC_USEPOLLING                  1066
-#define IDC_USEDRIVER                   1068
 #define IDC_QUERY_LOGGED_ON             1069
 #define IDC_AUTH_ADMIN_PASSWD           1076
 #define IDC_AUTH_VIEWONLY_PASSWD        1077
diff --git a/win/vncconfig/vncconfig.rc b/win/vncconfig/vncconfig.rc
index 49585b4..ebcf720 100644
--- a/win/vncconfig/vncconfig.rc
+++ b/win/vncconfig/vncconfig.rc
@@ -137,10 +137,8 @@
                     BS_AUTORADIOBUTTON,7,25,183,15
     CONTROL         "Poll console windows for updates",IDC_POLLCONSOLES,
                     "Button",BS_AUTOCHECKBOX | WS_TABSTOP,25,40,165,15
-    CONTROL         "Use VNC Mirror driver to track changes",IDC_USEDRIVER,
-                    "Button",BS_AUTORADIOBUTTON,7,55,183,15
     CONTROL         "Capture alpha-blended windows",IDC_CAPTUREBLT,"Button",
-                    BS_AUTOCHECKBOX | WS_TABSTOP,7,70,183,15
+                    BS_AUTOCHECKBOX | WS_TABSTOP,7,55,183,15
 END
 
 IDD_AUTH_VNC_PASSWD DIALOG DISCARDABLE  0, 0, 212, 70