get rid of GraphicPlane

its functionality is now folded into DisplayHardware
there will be more changes in that area.
diff --git a/services/surfaceflinger/EventThread.cpp b/services/surfaceflinger/EventThread.cpp
index 7c1aebe..0f11377 100644
--- a/services/surfaceflinger/EventThread.cpp
+++ b/services/surfaceflinger/EventThread.cpp
@@ -26,7 +26,7 @@
 #include <utils/Errors.h>
 #include <utils/Trace.h>
 
-#include "DisplayHardware/DisplayHardware.h"
+#include "DisplayHardware.h"
 #include "EventThread.h"
 #include "SurfaceFlinger.h"
 
@@ -38,7 +38,7 @@
 
 EventThread::EventThread(const sp<SurfaceFlinger>& flinger)
     : mFlinger(flinger),
-      mHw(flinger->graphicPlane(0).editDisplayHardware()),
+      mHw(const_cast<DisplayHardware&>(flinger->getDefaultDisplayHardware())), // XXX: eventthread will need rework
       mLastVSyncTimestamp(0),
       mVSyncTimestamp(0),
       mUseSoftwareVSync(false),