diff --git a/libraries/USB/usb_sil.c b/libraries/USB/usb_sil.c
deleted file mode 100644
--- a/libraries/USB/usb_sil.c
+++ /dev/null
@@ -1,103 +0,0 @@
-/**
-  ******************************************************************************
-  * @file    usb_sil.c
-  * @author  MCD Application Team
-  * @version V4.0.0
-  * @date    28-August-2012
-  * @brief   Simplified Interface Layer for Global Initialization and Endpoint
-  *          Rea/Write operations.
-  ******************************************************************************
-  * @attention
-  *
-  * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
-  *
-  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
-  * You may not use this file except in compliance with the License.
-  * You may obtain a copy of the License at:
-  *
-  *        http://www.st.com/software_license_agreement_liberty_v2
-  *
-  * Unless required by applicable law or agreed to in writing, software 
-  * distributed under the License is distributed on an "AS IS" BASIS, 
-  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-  * See the License for the specific language governing permissions and
-  * limitations under the License.
-  *
-  ******************************************************************************
-  */
-
-
-/* Includes ------------------------------------------------------------------*/
-#include "usb_lib.h"
-
-/* Private typedef -----------------------------------------------------------*/
-/* Private define ------------------------------------------------------------*/
-/* Private macro -------------------------------------------------------------*/
-/* Private variables ---------------------------------------------------------*/
-/* Extern variables ----------------------------------------------------------*/
-/* Private function prototypes -----------------------------------------------*/
-/* Private functions ---------------------------------------------------------*/
-
-/*******************************************************************************
-* Function Name  : USB_SIL_Init
-* Description    : Initialize the USB Device IP and the Endpoint 0.
-* Input          : None.
-* Output         : None.
-* Return         : Status.
-*******************************************************************************/
-uint32_t USB_SIL_Init(void)
-{
-  /* USB interrupts initialization */
-  /* clear pending interrupts */
-  _SetISTR(0);
-  wInterrupt_Mask = IMR_MSK;
-  /* set interrupts mask */
-  _SetCNTR(wInterrupt_Mask);
-  return 0;
-}
-
-/*******************************************************************************
-* Function Name  : USB_SIL_Write
-* Description    : Write a buffer of data to a selected endpoint.
-* Input          : - bEpAddr: The address of the non control endpoint.
-*                  - pBufferPointer: The pointer to the buffer of data to be written
-*                    to the endpoint.
-*                  - wBufferSize: Number of data to be written (in bytes).
-* Output         : None.
-* Return         : Status.
-*******************************************************************************/
-uint32_t USB_SIL_Write(uint8_t bEpAddr, uint8_t* pBufferPointer, uint32_t wBufferSize)
-{
-  /* Use the memory interface function to write to the selected endpoint */
-  UserToPMABufferCopy(pBufferPointer, GetEPTxAddr(bEpAddr & 0x7F), wBufferSize);
-
-  /* Update the data length in the control register */
-  SetEPTxCount((bEpAddr & 0x7F), wBufferSize);
-  
-  return 0;
-}
-
-/*******************************************************************************
-* Function Name  : USB_SIL_Read
-* Description    : Write a buffer of data to a selected endpoint.
-* Input          : - bEpAddr: The address of the non control endpoint.
-*                  - pBufferPointer: The pointer to which will be saved the 
-*                     received data buffer.
-* Output         : None.
-* Return         : Number of received data (in Bytes).
-*******************************************************************************/
-uint32_t USB_SIL_Read(uint8_t bEpAddr, uint8_t* pBufferPointer)
-{
-  uint32_t DataLength = 0;
-
-  /* Get the number of received data on the selected Endpoint */
-  DataLength = GetEPRxCount(bEpAddr & 0x7F);
-  
-  /* Use the memory interface function to write to the selected endpoint */
-  PMAToUserBufferCopy(pBufferPointer, GetEPRxAddr(bEpAddr & 0x7F), DataLength);
-
-  /* Return the number of received data */
-  return DataLength;
-}
-
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/