diff --git a/libraries/u8glib/u8g_dev_gprof.c b/libraries/u8glib/u8g_dev_gprof.c
deleted file mode 100644
--- a/libraries/u8glib/u8g_dev_gprof.c
+++ /dev/null
@@ -1,130 +0,0 @@
-/*
-
-  u8g_dev_gprof.c
-
-  Device for performance measurement with gprof.
-  Does not write any data, but uses a buffer.
-
-  Universal 8bit Graphics Library
-  
-  Copyright (c) 2011, 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"
-
-
-#define WIDTH 128
-#define HEIGHT 64
-#define PAGE_HEIGHT 8
-
-uint8_t u8g_dev_gprof_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg);
-
-uint8_t u8g_pb_dev_gprof_buf[WIDTH];
-u8g_pb_t u8g_pb_dev_gprof = { {PAGE_HEIGHT, HEIGHT, 0, 0, 0},  WIDTH, u8g_pb_dev_gprof_buf };
-
-u8g_dev_t u8g_dev_gprof = { u8g_dev_gprof_fn, &u8g_pb_dev_gprof, NULL };
-
-uint8_t u8g_dev_gprof_fn(u8g_t *u8g, u8g_dev_t *dev, uint8_t msg, void *arg)
-{
-  u8g_pb_t *pb = (u8g_pb_t *)(dev->dev_mem);
-  
-  switch(msg)
-  {
-    case U8G_DEV_MSG_INIT:
-      break;
-    case U8G_DEV_MSG_STOP:
-      break;
-    case U8G_DEV_MSG_PAGE_FIRST:
-      u8g_pb_Clear(pb);
-      u8g_page_First(&(pb->p));
-      break;
-    case U8G_DEV_MSG_PAGE_NEXT:
-      /*
-      {
-        uint8_t i, j;
-        uint8_t page_height;
-        page_height = pb->p.page_y1;
-        page_height -= pb->p.page_y0;
-        page_height++;
-        for( j = 0; j < page_height; j++ )
-        {
-          printf("%02d ", j);
-          for( i = 0; i < WIDTH; i++ )
-          {
-            if ( (u8g_pb_dev_stdout_buf[i] & (1<<j)) != 0 )
-              printf("#");
-            else
-              printf(".");
-          }
-          printf("\n");
-        }
-      }
-      */
-      if ( u8g_page_Next(&(pb->p)) == 0 )
-      {
-        //printf("\n");
-        return 0;
-      }
-      u8g_pb_Clear(pb);
-      break;
-#ifdef U8G_DEV_MSG_IS_BBX_INTERSECTION
-    case U8G_DEV_MSG_IS_BBX_INTERSECTION:
-       {
-        u8g_dev_arg_bbx_t *bbx = (u8g_dev_arg_bbx_t *)arg;
-        u8g_uint_t x2, y2;
-
-        y2 = bbx->y;
-        y2 += bbx->h;
-        y2--;
-        
-        if ( u8g_pb_IsYIntersection(pb, bbx->y, y2) == 0 )
-          return 0;
-        
-        /* maybe this one can be skiped... probability is very high to have an intersection, so it would be ok to always return 1 */
-        x2 = bbx->x;
-        x2 += bbx->w;
-        x2--;
-        
-        if ( u8g_pb_IsXIntersection(pb, bbx->x, x2) == 0 )
-          return 0;
-      }
-      return 1;
-#endif
-    case U8G_DEV_MSG_GET_PAGE_BOX:
-      u8g_pb_GetPageBox(pb, (u8g_box_t *)arg);
-      break;
-    case U8G_DEV_MSG_SET_COLOR_ENTRY:
-      break;
-    case U8G_DEV_MSG_SET_XY_CB:
-      break;
-  }
-  return u8g_dev_pb8v1_base_fn(u8g, dev, msg, arg);
-}