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.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: