Remove freezeDisplay(), which is no-op.

Change-Id: I2b70249a1545636fd6d98b58057b22f9529cad21
diff --git a/include/gui/SurfaceComposerClient.h b/include/gui/SurfaceComposerClient.h
index 3bd10de..c1c34f7 100644
--- a/include/gui/SurfaceComposerClient.h
+++ b/include/gui/SurfaceComposerClient.h
@@ -93,12 +93,6 @@
         
     //! Close a composer transaction on all active SurfaceComposerClients.
     static void closeGlobalTransaction(bool synchronous = false);
-    
-    //! Freeze the specified display but not transactions.
-    static status_t freezeDisplay(DisplayID dpy, uint32_t flags = 0);
-        
-    //! Resume updates on the specified display.
-    static status_t unfreezeDisplay(DisplayID dpy, uint32_t flags = 0);
 
     //! Set the orientation of the given display
     static int setOrientation(DisplayID dpy, int orientation, uint32_t flags);
diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index 8fa2167..8c953f7 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -542,20 +542,6 @@
 
 // ----------------------------------------------------------------------------
 
-status_t SurfaceComposerClient::freezeDisplay(DisplayID dpy, uint32_t flags)
-{
-    // This has been made a no-op because it can cause Gralloc buffer deadlocks.
-    return NO_ERROR;
-}
-
-status_t SurfaceComposerClient::unfreezeDisplay(DisplayID dpy, uint32_t flags)
-{
-    // This has been made a no-op because it can cause Gralloc buffer deadlocks.
-    return NO_ERROR;
-}
-
-// ----------------------------------------------------------------------------
-
 ScreenshotClient::ScreenshotClient()
     : mWidth(0), mHeight(0), mFormat(PIXEL_FORMAT_NONE) {
 }