Handle X11 events within the Win32 event loop

This unifies event handling and it allows X11 events to still be
processed even when the event loop is blocked.

src/wine-host/bridges/vst2.h

@@ -67,8 +67,6 @@ class Vst2Bridge : public HostBridge {
      */
     void run() override;
 
-    void handle_x11_events() noexcept override;
-
    protected:
     void close_sockets() override;