diff --git a/libraries/u8glib/u8g_virtual_screen.c b/libraries/u8glib/u8g_virtual_screen.c
deleted file mode 100644
--- a/libraries/u8glib/u8g_virtual_screen.c
+++ /dev/null
@@ -1,145 +0,0 @@
-/*
-
-  u8g_virtual_screen.c
-
-  Universal 8bit Graphics Library
-  
-  Copyright (c) 2012, olikraus@gmail.com
-  All rights reserved.
-
-  Redistribution and use in source and binary forms, with or without modification, 
-  are permitted provided that the following conditions are met:
-
-  * Redistributions of source code must retain the above copyright notice, this list 
-    of conditions and the following disclaimer.
-    
-  * Redistributions in binary form must reproduce the above copyright notice, this 
-    list of conditions and the following disclaimer in the documentation and/or other 
-    materials provided with the distribution.
-
-  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
-  CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
-  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
-  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
-  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
-  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
-  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
-  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
-  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
-  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
-  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
-  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
-  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
-  
-  
-*/
-
-#include "u8g.h"
-
-struct _u8g_vs_t
-{
-  u8g_uint_t x;
-  u8g_uint_t y;
-  u8g_t *u8g;
-};
-typedef struct _u8g_vs_t u8g_vs_t;
-
-#define U8g_VS_MAX 4
-uint8_t u8g_vs_cnt = 0;
-u8g_vs_t u8g_vs_list[U8g_VS_MAX]; 
-uint8_t u8g_vs_current;
-u8g_uint_t u8g_vs_width;
-u8g_uint_t u8g_vs_height;
-
-uint8_t u8g_dev_vs_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg)
-{
-  switch(msg)
-  {
-    default:
-      {
-	uint8_t i;
-	for( i = 0; i < u8g_vs_cnt; i++ )
-	{
-	  u8g_call_dev_fn(u8g_vs_list[i].u8g, u8g_vs_list[i].u8g->dev, msg, arg);
-	}
-      }
-      return 1;
-    case U8G_DEV_MSG_PAGE_FIRST:
-      u8g_vs_current = 0;
-      if ( u8g_vs_cnt != 0 )
-	return u8g_call_dev_fn(u8g_vs_list[u8g_vs_current].u8g, u8g_vs_list[u8g_vs_current].u8g->dev, msg, arg);
-      return 0;
-    case U8G_DEV_MSG_PAGE_NEXT:
-      {	
-	uint8_t ret = 0;
-	if ( u8g_vs_cnt != 0 )
-	  ret = u8g_call_dev_fn(u8g_vs_list[u8g_vs_current].u8g, u8g_vs_list[u8g_vs_current].u8g->dev, msg, arg);
-	if ( ret != 0 )
-	  return ret;
-	u8g_vs_current++;	/* next device */
-	if ( u8g_vs_current >= u8g_vs_cnt )  /* reached end? */
-	  return 0;
-	return u8g_call_dev_fn(u8g_vs_list[u8g_vs_current].u8g, u8g_vs_list[u8g_vs_current].u8g->dev, U8G_DEV_MSG_PAGE_FIRST, arg);	
-      }
-      return 0;
-    case U8G_DEV_MSG_GET_WIDTH:
-      *((u8g_uint_t *)arg) = u8g_vs_width;
-      break;
-    case U8G_DEV_MSG_GET_HEIGHT:
-      *((u8g_uint_t *)arg) = u8g_vs_height;
-      break;
-    case U8G_DEV_MSG_GET_PAGE_BOX:
-      if ( u8g_vs_current < u8g_vs_cnt )
-      {
-	u8g_call_dev_fn(u8g_vs_list[u8g_vs_current].u8g, u8g_vs_list[u8g_vs_current].u8g->dev, msg, arg);
-	((u8g_box_t *)arg)->x0 += u8g_vs_list[u8g_vs_current].x;
-	((u8g_box_t *)arg)->x1 += u8g_vs_list[u8g_vs_current].x;
-	((u8g_box_t *)arg)->y0 += u8g_vs_list[u8g_vs_current].y;
-	((u8g_box_t *)arg)->y1 += u8g_vs_list[u8g_vs_current].y;
-      }
-      else
-      {
-	((u8g_box_t *)arg)->x0 = 0;
-	((u8g_box_t *)arg)->x1 = 0;
-	((u8g_box_t *)arg)->y0 = 0;
-	((u8g_box_t *)arg)->y1 = 0;
-      }
-      return 1;
-    case U8G_DEV_MSG_SET_PIXEL:
-    case U8G_DEV_MSG_SET_8PIXEL:
-      if ( u8g_vs_current < u8g_vs_cnt )
-      {
-        ((u8g_dev_arg_pixel_t *)arg)->x -= u8g_vs_list[u8g_vs_current].x;
-        ((u8g_dev_arg_pixel_t *)arg)->y -= u8g_vs_list[u8g_vs_current].y;
-	return u8g_call_dev_fn(u8g_vs_list[u8g_vs_current].u8g, u8g_vs_list[u8g_vs_current].u8g->dev, msg, arg);
-      }
-      break;
-  }
-  return 1;
-}
-
-
-
-u8g_dev_t u8g_dev_vs = { u8g_dev_vs_fn, NULL, NULL };
-
-void u8g_SetVirtualScreenDimension(u8g_t *vs_u8g, u8g_uint_t width, u8g_uint_t height)
-{
-  if ( vs_u8g->dev != &u8g_dev_vs )
-    return; 	/* abort if there is no a virtual screen device */
-  u8g_vs_width = width;
-  u8g_vs_height = height;  
-}
-
-uint8_t u8g_AddToVirtualScreen(u8g_t *vs_u8g, u8g_uint_t x, u8g_uint_t y, u8g_t *child_u8g)
-{
-  if ( vs_u8g->dev != &u8g_dev_vs )
-    return 0; 	/* abort if there is no a virtual screen device */
-  if ( u8g_vs_cnt >= U8g_VS_MAX )
-    return 0;  	/* maximum number of  child u8g's reached */
-  u8g_vs_list[u8g_vs_cnt].u8g = child_u8g;
-  u8g_vs_list[u8g_vs_cnt].x = x;
-  u8g_vs_list[u8g_vs_cnt].y = y;
-  u8g_vs_cnt++;
-  return 1;
-}
-