diff --git a/libraries/USB/usb_sil.h b/libraries/USB/usb_sil.h
deleted file mode 100644
--- a/libraries/USB/usb_sil.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/**
-  ******************************************************************************
-  * @file    usb_sil.h
-  * @author  MCD Application Team
-  * @version V4.0.0
-  * @date    28-August-2012
-  * @brief   Simplified Interface Layer function prototypes.
-  ******************************************************************************
-  * @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.
-  *
-  ******************************************************************************
-  */
-
-
-/* Define to prevent recursive inclusion -------------------------------------*/
-#ifndef __USB_SIL_H
-#define __USB_SIL_H
-
-/* Includes ------------------------------------------------------------------*/
-/* Exported types ------------------------------------------------------------*/
-/* Exported constants --------------------------------------------------------*/
-/* Exported macro ------------------------------------------------------------*/
-/* Exported functions ------------------------------------------------------- */
-
-uint32_t USB_SIL_Init(void);
-uint32_t USB_SIL_Write(uint8_t bEpAddr, uint8_t* pBufferPointer, uint32_t wBufferSize);
-uint32_t USB_SIL_Read(uint8_t bEpAddr, uint8_t* pBufferPointer);
-
-/* External variables --------------------------------------------------------*/
-
-#endif /* __USB_SIL_H */
-
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/